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Warrington Certification Limited, Holmesfield Road, Warrington, WA1 2DS Tel. +44 (0) 1925-646777 Fax +44 (0) 1925-646667
Member of EOTA Authorised and notified according to Article 10 of the Council Directive 89/106/EEC of 21 December 1988 on the approximation of laws, regulations and administrative provisions of Member States relating to construction products.
European Organisation for Technical Approvals
EUOPEAN TECHNICAL APPROVAL ETA -11/0481
Trade name: Hensotherm 410KS
Holder of the approval: Rudolf Hensel GmbH Lauenburger Landstr 11, D-21039 Bornsen, Germany
Telefon : +49 40 72 10 62 12 Telefax : +49 40 72 10 62 52 Web : www.rudolf-hensel.de Generic type and use of construction product(s): Reactive Coating for the Fire Protection of
Structural Steel
Validity from: 01/05/2012
to: 01/05/2017
Manufacturing plant(s): Rudolf Hensel GmbH Lauenburger Landstr 11, D-21039 Bornsen, Germany
This European Technical Approval contains: 11 pages and 1 Annex, 30 pages in total.
European Organisation for Technical Approvals
Page 2 of 30
I LEGAL BASES AND GENERAL CONDITIONS 1 This European Technical Approval is issued by Warrington Certification Limited in
accordance with: The Council Directive (89/106/EEC)1 of 21 December 1988 on the approximation of laws, regulations and administrative provisions of Member States relating to construction products as amended by Council Directive 93/68/EEC of 22 July 19932.
UK implementation of CPD Statutory Instruments 1991, No 1620 Building and Buildings The Construction Products Regulations 1991- made 15 July 1991, laid before Parliament 22 July 1991, coming into force 27 December 1991, and amended by The Construction Products (Amendment) Regulations 1994 (Statutory Instruments 1994, No 3051).
Common Procedural Rules for Requesting, Preparing and the Granting of European Technical Approvals set out in the Annex to Commission Decision 94/23/EC3
European Technical Approval Guideline 018 Fire Protective Products Part 1:
General and Part 2: Reactive Coatings For Fire Protection of Steel Elements. 2 Warrington Certification Limited is authorised to check whether the provisions of
this European Technical Approval are met. Checking may take place in the manufacturing plant(s). Nevertheless, the responsibility for the conformity of the products with the European Technical Approval and for their fitness for their intended use remains with the holder of the European Technical Approval.
3 This European Technical Approval is not to be transferred to manufacturers or
agents of manufacturers other than those indicated on page 1, or manufacturing plants other than those indicated on page 1.
4 This European Technical Approval may be withdrawn by Warrington Certification
Limited pursuant to Article 5.1 of the Council Directive 89/106/EEC. 5 Reproduction of this European Technical Approval including transmission by
electronic means shall be in full. However, partial reproduction can be made with the written consent of Warrington Certification Limited. In this case partial reproduction has to be designated as such. Texts and drawings of advertising brochures shall not contradict or misuse the European Technical Approval.
6 The European Technical Approval is issued by the approval body in its official
language of English. This version should correspond fully to the version used by EOTA for circulation. Translations in other languages have to be designated as such.
1 Official Journal of the European Communities N° L40, 11 Feb 1989, p 12 2 Official Journal of the European Communities No L220, 30 Aug 1993, p 1. 3 Official Journal of the European Communities N° L17, 20 Jan 1994, p 34.
Page 3 of 30
II SPECIFIC CONDITIONS OF THE EUROPEAN TECHNICAL APPROVAL 1 Definition of product and intended use 1.1 General
Hensotherm 410KS is a spray or brush/roller applied intumescent paint formulated for the fire protection of structural steel elements installed in the following environmental conditions: Internal conditions – ETAG 018-2 Type Z2 Internal conditions with high humidity – ETAG 018-2 Type Z1
1.2 Intended Use
The intended use of Hensotherm 410KS is to fire protect various sizes of structural steel ‘H’ or ‘I’ beams and columns for up to a fire resistance classification of R120 and for design temperatures in the range of 350oC to 750oC.
1.3 Working life
The provisions made in this ETA are based on an assumed intended working life of the applied coating for the intended use of 10 years, provided that it is subject to appropriate use and maintenance. The indications given on the intended working life cannot be interpreted as a guarantee given by the producer, but are to be used as a means for selecting the appropriate product in relation to the expected economically reasonable working life of the works.
2 Characteristics of the product and methods of verification
The assessment of fitness for use has been made in accordance with ETAG 018-2.
ETAG Clause
No.
ETA Clause
No. Characteristic
Assessment of characteristic
5.1
Mechanical resistance and stability
Not relevant
5.2
2.1
Safety in case of fire
5.2.1 2.1.1 Resistance to fire
5.2.2 2.1.2 Reaction to fire
5.3 Hygiene, Health and the Environment
Page 4 of 30
5.3.2 2.2 - Release of dangerous substances
5.4 - Safety in use
Not relevant
5.5 - Protection against noise
Not relevant
5.6 - Energy, Economy and Heat Retention
Not relevant
5.7
2.3 Related aspects of serviceability
5.7.2.2
2.3.1 to 2.3.3
- Primer and top coat compatibility - Type Z1 Durability - Type Z2 Durability
5.7.3 and
Annex E 2.3.4 - Identification
2.1 Safety in case of fire
2.1.1 Resistance to Fire
The resistance to fire performance according to EN 13501-2 determined in accordance with test principles defined in EN 13381-8: 2010 including Annex A (slow heating curve). The test data was analysed adopting the graphical method defined in Annex E of EN 13381-8: 2010. Annex A summarises the results of the analysis.
In accordance with ETAG 018-2 (foreword), Hensotherm 410KS may be considered as a reactive coating kit that includes one or more primers and/or topcoats (Option 2). Until the withdrawal of relevant national test and classification standards, CE Marking will cover a finite number of variations in coating thickness subjected to a fire resistance assessment. As time progresses, the performance declaration for fire resistance covered by CE Marking may change and the ETA holder may incorporate the changes in this ETA by amendment or revision.
Page 5 of 30
In the meantime, and taking into account the transitional arrangements for test and classification standards and the corresponding national legislation (see EC Guidance paper J), the ETA holder shall be permitted to maintain and be able to use - on a national basis – the test data for this characteristic, based on relevant national standards, next to the performance declaration covered by the CE Marking based on this ETA.
2.1.2 Reaction to Fire
The fire protection coating in conjunction with the Hensogrund 1966E, Hensogrund 2K and Hensogrund AQ primers and Hensotop 84 and Hensotop 84 AQ topcoats has a performance determined for a reaction to fire classification in accordance with EN 13501-1 of Class E.
2.2 Dangerous substances
According to the manufacturer’s declaration, the product specification has been compared with Annex XVII of REACH and the ECHA Candidate List of Substances of Very High Concern to verify that that it does not contain such substances.
2.3 Related Aspects of Serviceability 2.3.1 Hensotherm 410KS has been assessed as being compatible, in accordance with the
test procedures defined in ETAG 018-2 Clause 5.7.2.1 with the following primers and topcoats:
Primers
Name Type
Hensogrund 1966E Alkyd resin, solvent based
Hensogrund 2K Two component epoxy resin, solvent based
Hensgrund AQ Water-based acrylic
Top Coats
Name Type
Hensotop 84 Acrylic Resin solvent based
Hensotop 84 AQ Acrylic resin water based
The Hensogrund 2K and Hensogrund AQ systems have been tested in accordance with the test procedures defined in ETAG 018-2 Clause 5.7.2.1 on galvanised steel substrates steel substrates and passed the performance requirements for compatibility.
2.3.2 HENSOTHERM 410KS has been assessed as having passed the requirements for use in internal conditions with high humidity defined in ETAG 018-2 for Type Z1 environmental conditions and can be used with and without the following top coats:
Page 6 of 30
Top Coats
Name Type
Hensotop 84 Acrylic Resin solvent based
Hensotop 84 AQ Acrylic resin water based
2.3.3 On the basis of passing the Type Z1 requirements HENSOTHERM 410KS has been
assessed as having also passed the requirements for internal use defined in ETAG 018-2 for Type Z2 environmental conditions and can be used with and without the above top coats.
2.3.4 Hensotherm 410KS has been identified in accordance with the methods of
identification defined in ETAG 018-2 Table 5.3. Each product container is identified with the name Hensotherm 410KS and is CE marked.
3 Evaluation of Conformity and CE marking 3.1 Attestation of Conformity system
The system of attestation of conformity specified by the European Commission Decision 99/454/EC for fire protective products is system 1 and is detailed as follows: Certification of the conformity of the product by an approved certification body on the basis of: (a) Tasks for the manufacturer
-factory production control
-testing of samples taken at the factory in accordance with a prescribed test plan
(b) Tasks for the Notified body
- initial type-testing of the product;
- initial inspection of factory and of factory production control – continuous surveillance, assessment and approval of factory production control
Page 7 of 30
3.2 Responsibilities 3.2.1 Tasks for the Manufacturer - 3.2.1.1 Factory production control
The manufacturer of Hensotherm 410KS covered by this European Technical
Approval shall document, operate and maintain an adequate factory production control system to enable the achievement of the required product characteristics, hence conformity of the product to this ETA, and the effective operation of the production control system to be checked.
The manufacturer shall draw up and keep up-to-date documents defining the factory production control that applies. The manufacturer’s documentation and procedures shall be appropriate to the product and manufacturing process. The factory production control system shall achieve an appropriate level of confidence in the conformity of the product. This involves:
a) the preparation of documented procedures and instructions relating to factory production control operations ;
b) the effective implementation of these procedures and instructions.
c) the recording of these procedures and their results.
d) the use of these results to correct any deviations, repair the effects of such deviations, treat any resulting instances of non-conformity and, if necessary, revise the factory production control to rectify the cause of non-conformity.
e) a procedure to ensure that both the Notified Body and the Certification Body are advised before any significant change to the product, its components or manufacturing process, is made.
f) a procedure to ensure that personnel involved in the production processes and the quality control procedures are qualified and adequately trained to carry out their required tasks.
g) that all testing and measuring equipment is maintained and up to date calibration records are documented.
h) maintenance of records to ensure every container of coating material produced is clearly labelled with the batch number, which allows traceability to its production to be identified.
Page 8 of 30
3.2.1.2 Other tasks for the manufacturer The following tables derived from ETAG 018-2 specify properties that should be controlled and minimum frequencies of control. The test method and threshold have been laid down in the factory production control plan.
Reactive Coating
Property Property
Paragraph (ETAG) Threshold
Minimum frequency of
tests
Char depth Annex G or similar Manufacturer’s
declaration, minimum value
Every batch
Insulating efficiency
Annex A or alternative(1)
Manufacturer’s declaration (2)
Every 10th batch or at least once
per month
Sag resistance
Manufacturer’s
declaration Every batch
Viscosity EN ISO 3219 Every batch
Raw materials(3)
Check specification Every delivery
Pigment dispersion
EN ISO 3219 Every batch
Non- volatile content
ISO 3251 Every batch
According Table 8.1 of ETAG 018-2
(1) agreed with Approvals bodies and manufacturer. (2)
if result of char depth is not sufficient an insulating efficiency test
should be carried out. (3)
check test results according to specification.
Page 9 of 30
Primer HENSOGRUND 1966E
Property Property
Paragraph (ETAG) Threshold
Minimum frequency of
tests
Raw materials(1) Check specification Every delivery
Viscosity EN ISO 3219 Every batch
Non-volatile content
ISO 3251 Every batch
Pigment content colour
Every batch
Fineness Every batch According Table 8.1 of ETAG 018-2 (1)
check test results according to specification.
Top Coat HENSOTOP 84 / HENSOTOP 84 AQ
Property Property
Paragraph (ETAG) Threshold
Minimum frequency of
tests
Raw materials(1) Check specification Every delivery
Viscosity EN ISO 3219 Every batch
Non-volatile content
ISO 3251 Every batch
Pigment content colour
Every batch
According Table 8.1 of ETAG 018-2 (1)
check test results according to specification.
3.2.2 Tasks of Notified Bodies 3.2.2.1. Initial type testing
The approval tests have been conducted on behalf the notified body in accordance ETAG 018, Parts 1 or 2, as relevant, and the notified ETA issuing body has assessed the results of these tests in accordance with the ETAG, as part of the ETA issuing procedure. These tests shall be used by the certification body for Certificate of Conformity purposes.
3.2.2.2. Assessment of the factory production control system - initial inspection
and continuous surveillance
Assessment of the factory production control system is the responsibility of the ETA issuing body. An initial inspection shall be carried out of the production unit specified in this ETA to demonstrate that the factory production control is in conformity with the ETA.
Page 10 of 30
Subsequently continuous surveillance of factory production control is necessary to ensure continuing conformity with the ETA. It is recommended that surveillance inspections be conducted at least twice a year. The results of certification of conformity and of the continuous surveillance shall be made available to Warrington Certification Limited. Where the provisions of the ETA are no longer fulfilled, the certificate of conformity shall be withdrawn by the certification body.
3.3 CE marking
The CE conformity marking symbol consists exclusively of the letters “CE” in accordance with Directive 93/68/EEC. NOTE: The manufacturer, or his authorised representative established in the EEA, is responsible for the affixing of the CE marking symbol. The CE marking symbol shall be accompanied by the following information: a) Identification number of the ETA issuing body;
b) The name or identifying mark of the producer;
c) Registered address of the producer;
d) The last two digits of the year in which the marking was first applied;
e) The number of the ETA;
f) Reference to ETAG 018, Parts 1 and 2;
g) Indication of intended use;
The CE marking symbol and items a) to g) above shall accompany the product and shall be included with the application instructions.
Additionally, at least the CE marking symbol and item a) of all this information shall be affixed to the supply containers and optionally on its packaging.
4. ASSUMPTIONS UNDER WHICH THE FITNESS FOR USE OF THE PRODUCT FOR THE INTENDED USE WILL BE ASSESSED
4.1 Manufacturing, transport and storage Hensotherm 410KS is manufactured in accordance with the provisions of the ETA
using the manufacturing process as identified during the inspection of the factory by Warrington Certification Limited and the approved body and laid down in the technical documentation.
It is assumed that the manufacture of Hensotherm 410KS fulfils the criteria for stable industrial production. The samples taken in connection with the evaluation of properties shall be representative of the whole production.
Page 11 of 30
4.2 Application The ETA is issued under the assumption that the application of Hensotherm 410KS
shall be in accordance with the manufacturer’s technical literature. 4.3 Maintenance and repair The assessment of the fitness for use is based on the assumption that necessary
maintenance and repair if required is carried out in accordance with the manufacturer’s instructions during the assumed intended working life.
Page 12 of 30
ANNEX A - Product Performance: Fire Resistance 1 This Annex relates to the use of Hensotherm 410KS for the fire protection of
‘H’ or ‘I’ shaped beams and columns. The precise scope is given in Tables 1-16 which show the total dry film thickness of Hensotherm 410KS (excluding primer and top coat) required to provide classifications of R15 to R120 for various design temperatures and section factors.
2. The product is approved on the basis of: i) Approval testing in accordance with the principles of EN 13381-8:2010.
ii) A design appraisal against this ETA adopting the graphical analysis defined in Annex E of EN 13381-8:2010.
3. The data presented in the tables in this Annex refers to both beams (three-sided fire
exposure) and columns (four sided exposure). 4. The data shown is applicable to steel sections blast cleaned to ISO 8501-1 SA21/2 or
equivalent and primed with the compatible primers and top coats listed in this ETA. Based on the test data the total dry film thickness of primer and top coat together should not exceed 0.20 mm.
5. The data for the ‘H’ and ‘I’ shaped columns applies also to other shaped steel
sections that have re-entrant details such as channels, angles and tees. 6. Hensotherm 410KS has been exposed to the slowing heating regime defined in
Annex A of EN 13381-8: 2010 and has satisfied the requirements.
Page 13 of 30
Tables of Results
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
60 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
65 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
70 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
75 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
80 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
85 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
90 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
95 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
100 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
105 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
110 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
115 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
120 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
125 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
130 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
135 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
140 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
145 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
150 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
155 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
160 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
165 0.247 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
170 0.254 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
175 0.262 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
180 0.269 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
185 0.277 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
190 0.285 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
195 0.292 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
200 0.300 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
205 0.307 0.251 0.243 0.243 0.243 0.243 0.243 0.243 0.243
210 0.315 0.259 0.243 0.243 0.243 0.243 0.243 0.243 0.243
215 0.322 0.266 0.243 0.243 0.243 0.243 0.243 0.243 0.243
220 0.330 0.274 0.243 0.243 0.243 0.243 0.243 0.243 0.243
225 0.337 0.282 0.243 0.243 0.243 0.243 0.243 0.243 0.243
230 0.345 0.289 0.243 0.243 0.243 0.243 0.243 0.243 0.243
235 0.352 0.297 0.250 0.243 0.243 0.243 0.243 0.243 0.243
240 0.360 0.305 0.258 0.243 0.243 0.243 0.243 0.243 0.243
245 0.367 0.312 0.266 0.243 0.243 0.243 0.243 0.243 0.243
250 0.375 0.320 0.274 0.243 0.243 0.243 0.243 0.243 0.243
255 0.382 0.328 0.282 0.243 0.243 0.243 0.243 0.243 0.243
260 0.390 0.335 0.290 0.248 0.243 0.243 0.243 0.243 0.243
265 0.397 0.343 0.298 0.257 0.243 0.243 0.243 0.243 0.243
270 0.405 0.351 0.306 0.266 0.243 0.243 0.243 0.243 0.243
275 0.412 0.358 0.314 0.274 0.243 0.243 0.243 0.243 0.243
280 0.420 0.366 0.323 0.283 0.245 0.243 0.243 0.243 0.243
285 0.427 0.374 0.331 0.292 0.254 0.243 0.243 0.243 0.243
290 0.435 0.381 0.339 0.300 0.263 0.243 0.243 0.243 0.243
295 0.442 0.389 0.347 0.309 0.273 0.243 0.243 0.243 0.243
300 0.450 0.397 0.355 0.318 0.282 0.243 0.243 0.243 0.243
305 0.457 0.404 0.363 0.326 0.292 0.252 0.243 0.243 0.243
310 0.465 0.412 0.371 0.335 0.301 0.263 0.243 0.243 0.243
315 0.472 0.420 0.379 0.344 0.310 0.273 0.243 0.243 0.243
320 0.480 0.427 0.387 0.352 0.320 0.283 0.243 0.243 0.243
325 0.487 0.435 0.395 0.361 0.329 0.294 0.243 0.243 0.243
330 0.495 0.443 0.403 0.370 0.339 0.304 0.243 0.243 0.243
335 0.518 0.450 0.411 0.378 0.348 0.315 0.276 0.243 0.243
340 0.551 0.458 0.419 0.387 0.357 0.325 0.287 0.243 0.243
Thickness (mm) Required for a Design Temperature of
Table 1: I-Section Beams 15 Minutes
Thickness is intumescent only.
Page 14 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
60 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
65 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
70 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
75 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
80 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
85 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
90 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
95 0.246 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
100 0.257 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
105 0.269 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
110 0.280 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
115 0.292 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
120 0.303 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
125 0.315 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
130 0.327 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
135 0.338 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
140 0.350 0.248 0.243 0.243 0.243 0.243 0.243 0.243 0.243
145 0.361 0.255 0.243 0.243 0.243 0.243 0.243 0.243 0.243
150 0.373 0.261 0.243 0.243 0.243 0.243 0.243 0.243 0.243
155 0.385 0.268 0.243 0.243 0.243 0.243 0.243 0.243 0.243
160 0.396 0.275 0.243 0.243 0.243 0.243 0.243 0.243 0.243
165 0.408 0.282 0.243 0.243 0.243 0.243 0.243 0.243 0.243
170 0.419 0.289 0.243 0.243 0.243 0.243 0.243 0.243 0.243
175 0.431 0.296 0.243 0.243 0.243 0.243 0.243 0.243 0.243
180 0.442 0.302 0.244 0.243 0.243 0.243 0.243 0.243 0.243
185 0.454 0.309 0.252 0.243 0.243 0.243 0.243 0.243 0.243
190 0.466 0.316 0.259 0.243 0.243 0.243 0.243 0.243 0.243
195 0.477 0.323 0.267 0.243 0.243 0.243 0.243 0.243 0.243
200 0.489 0.330 0.274 0.243 0.243 0.243 0.243 0.243 0.243
205 0.500 0.337 0.281 0.245 0.243 0.243 0.243 0.243 0.243
210 0.510 0.343 0.289 0.252 0.243 0.243 0.243 0.243 0.243
215 0.520 0.350 0.296 0.260 0.243 0.243 0.243 0.243 0.243
220 0.530 0.357 0.304 0.268 0.243 0.243 0.243 0.243 0.243
225 0.541 0.364 0.311 0.276 0.243 0.243 0.243 0.243 0.243
230 0.551 0.371 0.319 0.283 0.248 0.243 0.243 0.243 0.243
235 0.561 0.378 0.326 0.291 0.256 0.243 0.243 0.243 0.243
240 0.571 0.385 0.334 0.299 0.264 0.243 0.243 0.243 0.243
245 0.581 0.391 0.341 0.307 0.273 0.243 0.243 0.243 0.243
250 0.591 0.398 0.349 0.315 0.281 0.244 0.243 0.243 0.243
255 0.601 0.405 0.356 0.322 0.289 0.253 0.243 0.243 0.243
260 0.611 0.412 0.364 0.330 0.297 0.262 0.243 0.243 0.243
265 0.622 0.419 0.371 0.338 0.306 0.271 0.243 0.243 0.243
270 0.632 0.426 0.379 0.346 0.314 0.280 0.243 0.243 0.243
275 0.642 0.432 0.386 0.353 0.322 0.289 0.250 0.243 0.243
280 0.652 0.439 0.393 0.361 0.330 0.298 0.259 0.243 0.243
285 0.662 0.446 0.401 0.369 0.338 0.306 0.269 0.243 0.243
290 0.672 0.453 0.408 0.377 0.347 0.315 0.279 0.243 0.243
295 0.682 0.460 0.416 0.385 0.355 0.324 0.288 0.252 0.243
300 0.692 0.467 0.423 0.392 0.363 0.333 0.298 0.263 0.243
305 0.702 0.473 0.431 0.400 0.371 0.342 0.308 0.273 0.243
310 0.713 0.480 0.438 0.408 0.380 0.351 0.317 0.284 0.248
315 0.723 0.487 0.446 0.416 0.388 0.360 0.327 0.294 0.260
320 0.733 0.494 0.453 0.423 0.396 0.369 0.336 0.305 0.271
325 0.743 0.512 0.461 0.431 0.404 0.377 0.346 0.315 0.282
330 0.785 0.546 0.468 0.439 0.412 0.386 0.356 0.326 0.294
335 0.835 0.580 0.476 0.447 0.421 0.395 0.365 0.336 0.305
340 0.885 0.615 0.483 0.454 0.429 0.404 0.375 0.347 0.316
Thickness (mm) Required for a Design Temperature of
Table 2: I-Section Beams 20 Minutes
Thickness is intumescent only.
Page 15 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
60 0.297 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
65 0.329 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.243
70 0.360 0.251 0.243 0.243 0.243 0.243 0.243 0.243 0.243
75 0.391 0.271 0.243 0.243 0.243 0.243 0.243 0.243 0.243
80 0.423 0.291 0.243 0.243 0.243 0.243 0.243 0.243 0.243
85 0.454 0.312 0.243 0.243 0.243 0.243 0.243 0.243 0.243
90 0.485 0.332 0.254 0.243 0.243 0.243 0.243 0.243 0.243
95 0.513 0.352 0.264 0.243 0.243 0.243 0.243 0.243 0.243
100 0.537 0.372 0.275 0.243 0.243 0.243 0.243 0.243 0.243
105 0.561 0.393 0.286 0.243 0.243 0.243 0.243 0.243 0.243
110 0.585 0.413 0.297 0.245 0.243 0.243 0.243 0.243 0.243
115 0.609 0.433 0.308 0.251 0.243 0.243 0.243 0.243 0.243
120 0.634 0.453 0.319 0.257 0.243 0.243 0.243 0.243 0.243
125 0.658 0.474 0.330 0.264 0.243 0.243 0.243 0.243 0.243
130 0.682 0.494 0.341 0.270 0.243 0.243 0.243 0.243 0.243
135 0.706 0.506 0.352 0.276 0.243 0.243 0.243 0.243 0.243
140 0.730 0.516 0.363 0.282 0.243 0.243 0.243 0.243 0.243
145 0.751 0.526 0.374 0.288 0.243 0.243 0.243 0.243 0.243
150 0.765 0.536 0.385 0.295 0.243 0.243 0.243 0.243 0.243
155 0.780 0.547 0.395 0.301 0.243 0.243 0.243 0.243 0.243
160 0.794 0.557 0.406 0.307 0.243 0.243 0.243 0.243 0.243
165 0.809 0.567 0.417 0.313 0.245 0.243 0.243 0.243 0.243
170 0.823 0.577 0.428 0.320 0.253 0.243 0.243 0.243 0.243
175 0.838 0.587 0.439 0.326 0.260 0.243 0.243 0.243 0.243
180 0.852 0.597 0.450 0.332 0.268 0.243 0.243 0.243 0.243
185 0.867 0.607 0.461 0.338 0.276 0.246 0.243 0.243 0.243
190 0.881 0.617 0.472 0.345 0.283 0.254 0.243 0.243 0.243
195 0.896 0.628 0.483 0.351 0.291 0.261 0.243 0.243 0.243
200 0.910 0.638 0.494 0.357 0.298 0.269 0.243 0.243 0.243
205 0.925 0.648 0.504 0.363 0.306 0.277 0.243 0.243 0.243
210 0.939 0.658 0.514 0.370 0.314 0.285 0.243 0.243 0.243
215 0.954 0.668 0.523 0.376 0.321 0.293 0.259 0.243 0.243
220 0.968 0.678 0.533 0.382 0.329 0.301 0.268 0.243 0.243
225 0.983 0.688 0.543 0.388 0.337 0.309 0.276 0.243 0.243
230 0.997 0.698 0.553 0.394 0.344 0.317 0.284 0.251 0.243
235 1.012 0.709 0.563 0.401 0.352 0.325 0.293 0.260 0.243
240 1.026 0.719 0.572 0.407 0.359 0.333 0.301 0.269 0.243
245 1.041 0.729 0.582 0.413 0.367 0.341 0.309 0.278 0.247
250 1.055 0.739 0.592 0.419 0.375 0.349 0.318 0.287 0.256
255 1.070 0.756 0.602 0.426 0.382 0.357 0.326 0.296 0.265
260 1.084 0.782 0.612 0.432 0.390 0.365 0.334 0.305 0.275
265 1.099 0.808 0.622 0.438 0.397 0.373 0.343 0.314 0.284
270 1.114 0.834 0.631 0.444 0.405 0.381 0.351 0.322 0.294
275 1.128 0.861 0.641 0.451 0.413 0.388 0.359 0.331 0.303
280 1.143 0.887 0.651 0.457 0.420 0.396 0.368 0.340 0.312
285 1.157 0.913 0.661 0.463 0.428 0.404 0.376 0.349 0.322
290 1.172 0.940 0.671 0.469 0.436 0.412 0.385 0.358 0.331
295 1.186 0.966 0.680 0.476 0.443 0.420 0.393 0.367 0.340
300 1.201 0.992 0.690 0.482 0.451 0.428 0.401 0.376 0.350
305 1.215 1.018 0.700 0.488 0.458 0.436 0.410 0.385 0.359
310 1.230 1.045 0.710 0.494 0.466 0.444 0.418 0.393 0.369
315 1.244 1.071 0.720 0.512 0.474 0.452 0.426 0.402 0.378
320 1.259 1.097 0.729 0.546 0.481 0.460 0.435 0.411 0.387
325 1.273 1.124 0.739 0.580 0.489 0.468 0.443 0.420 0.397
330 1.377 1.150 0.768 0.615 0.496 0.476 0.451 0.429 0.406
335 1.503 1.176 0.824 0.649 0.527 0.484 0.460 0.438 0.415
340 1.629 1.202 0.881 0.683 0.563 0.492 0.468 0.447 0.425
Thickness (mm) Required for a Design Temperature of
Table 3: I-Section Beams 30 Minutes
Thickness is intumescent only.
Page 16 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
60 0.752 0.472 0.357 0.482 0.243 0.243 0.243 0.243 0.243
65 0.752 0.505 0.390 0.482 0.243 0.243 0.243 0.243 0.243
70 0.752 0.537 0.424 0.482 0.243 0.243 0.243 0.243 0.243
75 0.794 0.570 0.458 0.482 0.263 0.243 0.243 0.243 0.243
80 0.836 0.602 0.491 0.482 0.283 0.243 0.243 0.243 0.243
85 0.878 0.635 0.513 0.482 0.304 0.243 0.243 0.243 0.243
90 0.921 0.667 0.533 0.482 0.325 0.248 0.243 0.243 0.243
95 0.963 0.700 0.552 0.482 0.345 0.262 0.243 0.243 0.243
100 1.005 0.732 0.571 0.494 0.366 0.277 0.243 0.243 0.243
105 1.048 0.756 0.591 0.505 0.387 0.291 0.243 0.243 0.243
110 1.090 0.775 0.610 0.516 0.407 0.306 0.243 0.243 0.243
115 1.132 0.794 0.629 0.527 0.428 0.320 0.243 0.243 0.243
120 1.175 0.813 0.649 0.538 0.448 0.335 0.248 0.243 0.243
125 1.217 0.832 0.668 0.549 0.469 0.350 0.256 0.243 0.243
130 1.259 0.850 0.687 0.560 0.490 0.364 0.264 0.243 0.243
135 1.291 0.869 0.706 0.571 0.502 0.379 0.273 0.243 0.243
140 1.317 0.888 0.726 0.583 0.509 0.393 0.281 0.243 0.243
145 1.342 0.907 0.745 0.594 0.516 0.408 0.289 0.243 0.243
150 1.368 0.926 0.760 0.605 0.522 0.422 0.297 0.243 0.243
155 1.393 0.945 0.774 0.616 0.529 0.437 0.306 0.243 0.243
160 1.418 0.963 0.789 0.627 0.536 0.451 0.314 0.243 0.243
165 1.444 0.982 0.804 0.638 0.543 0.466 0.322 0.243 0.243
170 1.469 1.001 0.818 0.649 0.550 0.481 0.330 0.247 0.243
175 1.495 1.020 0.833 0.660 0.556 0.495 0.338 0.256 0.243
180 1.520 1.039 0.848 0.672 0.563 0.504 0.347 0.264 0.243
185 1.546 1.058 0.862 0.683 0.570 0.512 0.355 0.273 0.245
190 1.571 1.076 0.877 0.694 0.577 0.520 0.363 0.281 0.254
195 1.596 1.095 0.892 0.705 0.584 0.528 0.371 0.289 0.262
200 1.622 1.114 0.906 0.716 0.590 0.536 0.380 0.298 0.271
205 1.647 1.133 0.921 0.727 0.597 0.544 0.388 0.306 0.280
210 1.673 1.152 0.936 0.738 0.604 0.552 0.396 0.315 0.288
215 1.698 1.171 0.950 0.753 0.611 0.560 0.404 0.323 0.297
220 1.724 1.189 0.965 0.773 0.617 0.568 0.412 0.332 0.306
225 1.749 1.208 0.980 0.793 0.624 0.576 0.421 0.340 0.314
230 1.774 1.227 0.994 0.813 0.631 0.584 0.429 0.348 0.323
235 1.800 1.246 1.009 0.834 0.638 0.592 0.437 0.357 0.332
240 1.825 1.265 1.024 0.854 0.645 0.600 0.445 0.365 0.340
245 1.851 1.289 1.038 0.874 0.651 0.608 0.454 0.374 0.349
250 1.322 1.053 0.894 0.658 0.616 0.462 0.382 0.358
255 1.355 1.068 0.914 0.665 0.624 0.470 0.390 0.366
260 1.388 1.082 0.934 0.672 0.632 0.478 0.399 0.375
265 1.421 1.097 0.954 0.679 0.640 0.486 0.407 0.384
270 1.455 1.112 0.974 0.685 0.648 0.495 0.416 0.392
275 1.488 1.126 0.994 0.692 0.656 0.508 0.424 0.401
280 1.521 1.141 1.015 0.699 0.664 0.525 0.432 0.410
285 1.554 1.156 1.035 0.706 0.672 0.541 0.441 0.418
290 1.587 1.170 1.055 0.712 0.680 0.558 0.449 0.427
295 1.620 1.185 1.075 0.719 0.688 0.575 0.458 0.436
300 1.653 1.200 1.095 0.726 0.696 0.591 0.466 0.444
305 1.686 1.214 1.115 0.733 0.704 0.608 0.474 0.453
310 1.719 1.229 1.135 0.740 0.712 0.625 0.483 0.462
315 1.752 1.244 1.155 0.757 0.720 0.642 0.491 0.470
320 1.785 1.258 1.175 0.816 0.727 0.658 0.504 0.479
325 1.818 1.273 1.196 0.875 0.735 0.675 0.535 0.488
330 1.851 1.394 1.216 0.934 0.743 0.692 0.566 0.496
335 1.541 1.236 0.993 0.799 0.708 0.597 0.523
340 1.687 1.256 1.052 0.868 0.725 0.628 0.555
Thickness (mm) Required for a Design Temperature of
Table 4: I-Section Beams 45 Minutes
Thickness is intumescent only.
Page 17 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
60 1.130 0.796 0.590 0.507 0.408 0.498 0.243 0.243 0.243
65 1.130 0.796 0.622 0.531 0.453 0.498 0.243 0.243 0.243
70 1.203 0.849 0.654 0.555 0.498 0.498 0.258 0.243 0.243
75 1.276 0.903 0.687 0.580 0.515 0.498 0.290 0.243 0.243
80 1.349 0.956 0.719 0.604 0.532 0.498 0.321 0.243 0.243
85 1.009 0.751 0.628 0.549 0.498 0.353 0.243 0.243
90 1.063 0.780 0.653 0.567 0.509 0.385 0.257 0.243
95 1.116 0.810 0.677 0.584 0.521 0.416 0.280 0.243
100 1.169 0.839 0.701 0.601 0.532 0.448 0.303 0.243
105 1.223 0.869 0.726 0.618 0.544 0.479 0.325 0.243
110 1.276 0.898 0.748 0.635 0.555 0.501 0.348 0.243
115 1.305 0.928 0.761 0.652 0.567 0.507 0.371 0.249
120 1.334 0.957 0.775 0.670 0.578 0.514 0.394 0.265
125 1.362 0.987 0.788 0.687 0.589 0.520 0.416 0.280
130 1.391 1.016 0.802 0.704 0.601 0.526 0.439 0.296
135 1.420 1.046 0.815 0.721 0.612 0.533 0.462 0.312
140 1.449 1.075 0.829 0.738 0.624 0.539 0.484 0.328
145 1.477 1.105 0.843 0.754 0.635 0.546 0.501 0.344
150 1.506 1.134 0.856 0.768 0.647 0.552 0.508 0.359
155 1.535 1.164 0.870 0.783 0.658 0.559 0.514 0.375
160 1.564 1.193 0.883 0.797 0.670 0.565 0.521 0.391
165 1.592 1.223 0.897 0.812 0.681 0.572 0.528 0.407
170 1.621 1.252 0.910 0.826 0.692 0.578 0.535 0.422
175 1.650 1.280 0.924 0.841 0.704 0.585 0.541 0.438
180 1.679 1.301 0.937 0.855 0.715 0.591 0.548 0.454
185 1.707 1.321 0.951 0.870 0.727 0.598 0.555 0.470
190 1.736 1.342 0.964 0.884 0.738 0.604 0.562 0.485
195 1.765 1.363 0.978 0.899 0.752 0.611 0.569 0.500
200 1.794 1.383 0.992 0.913 0.771 0.617 0.575 0.508
205 1.822 1.404 1.005 0.928 0.789 0.623 0.582 0.517
210 1.851 1.425 1.019 0.942 0.808 0.630 0.589 0.525
215 1.445 1.032 0.957 0.826 0.636 0.596 0.534
220 1.466 1.046 0.971 0.845 0.643 0.603 0.543
225 1.487 1.059 0.986 0.863 0.649 0.609 0.551
230 1.507 1.073 1.000 0.881 0.656 0.616 0.560
235 1.528 1.086 1.015 0.900 0.662 0.623 0.568
240 1.549 1.100 1.029 0.918 0.669 0.630 0.577
245 1.569 1.113 1.044 0.937 0.675 0.636 0.585
250 1.590 1.127 1.058 0.955 0.682 0.643 0.594
255 1.611 1.141 1.073 0.974 0.688 0.650 0.603
260 1.631 1.154 1.087 0.992 0.695 0.657 0.611
265 1.652 1.168 1.102 1.011 0.701 0.664 0.620
270 1.673 1.181 1.116 1.029 0.707 0.670 0.628
275 1.693 1.195 1.131 1.047 0.714 0.677 0.637
280 1.714 1.208 1.145 1.066 0.720 0.684 0.646
285 1.735 1.222 1.160 1.084 0.727 0.691 0.654
290 1.755 1.235 1.174 1.103 0.733 0.698 0.663
295 1.776 1.249 1.189 1.121 0.740 0.704 0.671
300 1.797 1.262 1.203 1.140 0.756 0.711 0.680
305 1.817 1.276 1.218 1.158 0.809 0.718 0.688
310 1.838 1.402 1.232 1.176 0.862 0.725 0.697
315 1.859 1.528 1.247 1.195 0.915 0.731 0.706
320 1.654 1.261 1.213 0.968 0.738 0.714
325 1.780 1.276 1.232 1.021 0.745 0.723
330 1.452 1.250 1.074 0.821 0.731
335 1.629 1.269 1.127 0.897 0.740
340 1.805 1.389 1.180 0.973 0.779
Thickness (mm) Required for a Design Temperature of
Table 5: I-Section Beams 60 Minutes
Thickness is intumescent only.
Page 18 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
60 1.072 0.926 0.716 0.595 0.532 0.476 0.479 0.243
65 1.166 0.926 0.716 0.620 0.553 0.492 0.479 0.243
70 1.259 0.926 0.716 0.645 0.574 0.508 0.479 0.243
75 1.353 0.986 0.756 0.670 0.595 0.523 0.479 0.278
80 1.047 0.797 0.695 0.616 0.539 0.489 0.315
85 1.107 0.837 0.720 0.636 0.555 0.500 0.352
90 1.167 0.878 0.745 0.657 0.571 0.511 0.388
95 1.228 0.919 0.769 0.678 0.587 0.521 0.425
100 1.283 0.959 0.793 0.699 0.603 0.532 0.461
105 1.315 1.000 0.817 0.720 0.618 0.543 0.498
110 1.348 1.040 0.841 0.741 0.634 0.553 0.504
115 1.380 1.081 0.865 0.756 0.650 0.564 0.511
120 1.413 1.122 0.889 0.769 0.666 0.575 0.517
125 1.446 1.162 0.912 0.782 0.682 0.585 0.524
130 1.478 1.203 0.936 0.796 0.698 0.596 0.530
135 1.511 1.244 0.960 0.809 0.713 0.607 0.537
140 1.544 1.281 0.984 0.822 0.729 0.617 0.543
145 1.576 1.306 1.008 0.836 0.745 0.628 0.549
150 1.609 1.331 1.032 0.849 0.760 0.639 0.556
155 1.642 1.357 1.056 0.862 0.775 0.649 0.562
160 1.674 1.382 1.080 0.876 0.790 0.660 0.569
165 1.707 1.407 1.104 0.889 0.805 0.670 0.575
170 1.740 1.432 1.128 0.902 0.820 0.681 0.582
175 1.772 1.457 1.152 0.916 0.834 0.692 0.588
180 1.805 1.483 1.176 0.929 0.849 0.702 0.594
185 1.838 1.508 1.199 0.942 0.864 0.713 0.601
190 1.870 1.533 1.223 0.956 0.879 0.724 0.607
195 1.558 1.247 0.969 0.894 0.734 0.614
200 1.583 1.271 0.982 0.909 0.745 0.620
205 1.609 1.295 0.996 0.924 0.765 0.627
210 1.634 1.319 1.009 0.939 0.784 0.633
215 1.659 1.342 1.023 0.954 0.804 0.640
220 1.684 1.366 1.036 0.969 0.824 0.646
225 1.709 1.389 1.049 0.984 0.843 0.652
230 1.734 1.413 1.063 0.999 0.863 0.659
235 1.760 1.437 1.076 1.013 0.883 0.665
240 1.785 1.460 1.089 1.028 0.902 0.672
245 1.810 1.484 1.103 1.043 0.922 0.678
250 1.835 1.507 1.116 1.058 0.942 0.685
255 1.860 1.531 1.129 1.073 0.961 0.691
260 1.555 1.143 1.088 0.981 0.697
265 1.578 1.156 1.103 1.001 0.704
270 1.602 1.169 1.118 1.020 0.710
275 1.626 1.183 1.133 1.040 0.717
280 1.649 1.196 1.148 1.060 0.723
285 1.673 1.209 1.163 1.079 0.730
290 1.696 1.223 1.178 1.099 0.736
295 1.720 1.236 1.192 1.119 0.742
300 1.744 1.249 1.207 1.138 0.779
305 1.767 1.263 1.222 1.158 0.835
310 1.791 1.276 1.237 1.178 0.892
315 1.814 1.452 1.252 1.197 0.948
320 1.838 1.629 1.267 1.217 1.005
325 1.862 1.805 1.357 1.237 1.061
330 1.561 1.256 1.118
335 1.764 1.276 1.174
340 1.479 1.231
Thickness (mm) Required for a Design Temperature of
Table 6: I-Section Beams 75 Minutes
Thickness is intumescent only.
Page 19 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
60 1.276 0.869 0.766 0.699 0.606 0.509 0.367
65 1.276 0.939 0.766 0.699 0.606 0.529 0.422
70 1.009 0.816 0.699 0.628 0.549 0.476
75 1.079 0.866 0.729 0.651 0.568 0.507
80 1.150 0.916 0.759 0.673 0.588 0.522
85 1.220 0.966 0.795 0.696 0.608 0.537
90 1.283 1.016 0.830 0.718 0.627 0.552
95 1.318 1.066 0.865 0.741 0.647 0.566
100 1.354 1.116 0.901 0.762 0.666 0.581
105 1.389 1.166 0.936 0.784 0.686 0.596
110 1.424 1.216 0.972 0.806 0.706 0.611
115 1.459 1.266 1.007 0.828 0.725 0.626
120 1.495 1.299 1.042 0.849 0.745 0.641
125 1.530 1.328 1.078 0.871 0.759 0.656
130 1.565 1.357 1.113 0.893 0.773 0.671
135 1.600 1.385 1.149 0.915 0.786 0.685
140 1.636 1.414 1.184 0.937 0.800 0.700
145 1.671 1.443 1.219 0.958 0.814 0.715
150 1.706 1.472 1.255 0.980 0.828 0.730
155 1.742 1.500 1.286 1.002 0.841 0.745
160 1.777 1.529 1.310 1.024 0.855 0.761
165 1.812 1.558 1.334 1.045 0.869 0.777
170 1.847 1.587 1.359 1.067 0.883 0.793
175 1.615 1.383 1.089 0.896 0.809
180 1.644 1.407 1.111 0.910 0.824
185 1.673 1.431 1.132 0.924 0.840
190 1.702 1.456 1.154 0.938 0.856
195 1.730 1.480 1.176 0.951 0.872
200 1.759 1.504 1.198 0.965 0.888
205 1.788 1.528 1.219 0.979 0.904
210 1.817 1.553 1.241 0.993 0.920
215 1.845 1.577 1.263 1.006 0.936
220 1.874 1.601 1.287 1.020 0.952
225 1.625 1.315 1.034 0.968
230 1.650 1.342 1.048 0.983
235 1.674 1.370 1.061 0.999
240 1.698 1.397 1.075 1.015
245 1.722 1.425 1.089 1.031
250 1.747 1.452 1.103 1.047
255 1.771 1.480 1.116 1.063
260 1.795 1.507 1.130 1.079
265 1.820 1.535 1.144 1.095
270 1.844 1.563 1.158 1.111
275 1.868 1.590 1.171 1.127
280 1.618 1.185 1.142
285 1.645 1.199 1.158
290 1.673 1.213 1.174
295 1.700 1.226 1.190
300 1.728 1.240 1.206
305 1.755 1.254 1.222
310 1.783 1.268 1.238
315 1.811 1.352 1.254
320 1.838 1.541 1.270
325 1.866 1.729 1.382
330 1.558
335 1.734
340
Table 7: I-Section Beams 90 Minutes
Thickness (mm) Required for a Design Temperature of
Thickness is intumescent only.
Page 20 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
60 1.276 1.222 0.915 0.743 0.666 0.545
65 1.276 1.222 0.915 0.743 0.666 0.567
70 1.222 0.915 0.743 0.666 0.590
75 1.222 0.973 0.788 0.691 0.613
80 1.260 1.031 0.832 0.715 0.636
85 1.299 1.090 0.877 0.740 0.659
90 1.338 1.148 0.921 0.768 0.681
95 1.377 1.206 0.965 0.796 0.704
100 1.416 1.264 1.010 0.825 0.727
105 1.455 1.303 1.054 0.853 0.749
110 1.494 1.337 1.098 0.882 0.767
115 1.533 1.371 1.143 0.911 0.786
120 1.572 1.405 1.187 0.939 0.804
125 1.611 1.439 1.232 0.968 0.822
130 1.649 1.473 1.276 0.996 0.841
135 1.688 1.507 1.304 1.025 0.859
140 1.727 1.541 1.333 1.053 0.878
145 1.766 1.574 1.361 1.082 0.896
150 1.805 1.608 1.390 1.110 0.915
155 1.844 1.642 1.418 1.139 0.933
160 1.676 1.447 1.168 0.952
165 1.710 1.475 1.196 0.970
170 1.744 1.504 1.225 0.988
175 1.778 1.532 1.253 1.007
180 1.812 1.560 1.281 1.025
185 1.846 1.589 1.303 1.044
190 1.617 1.326 1.062
195 1.646 1.349 1.081
200 1.674 1.372 1.099
205 1.703 1.395 1.117
210 1.731 1.417 1.136
215 1.759 1.440 1.154
220 1.788 1.463 1.173
225 1.816 1.486 1.191
230 1.845 1.509 1.210
235 1.873 1.531 1.228
240 1.554 1.247
245 1.577 1.265
250 1.600 1.291
255 1.623 1.329
260 1.645 1.367
265 1.668 1.404
270 1.691 1.442
275 1.714 1.480
280 1.737 1.518
285 1.759 1.556
290 1.782 1.593
295 1.805 1.631
300 1.828 1.669
305 1.851 1.707
310 1.873 1.745
315 1.782
320 1.820
325 1.858
330
335
340
Table 8: I-Section Beams 105 Minutes
Thickness (mm) Required for a Design Temperature of
Thickness is intumescent only.
Page 21 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
60 1.276 0.916 0.803 0.694
65 1.276 0.916 0.803 0.694
70 1.276 0.982 0.803 0.694
75 1.276 1.049 0.853 0.723
80 1.116 0.902 0.752
85 1.183 0.951 0.787
90 1.249 1.000 0.823
95 1.298 1.050 0.858
100 1.336 1.099 0.894
105 1.373 1.148 0.929
110 1.410 1.197 0.964
115 1.447 1.246 1.000
120 1.485 1.289 1.035
125 1.522 1.321 1.071
130 1.559 1.352 1.106
135 1.596 1.384 1.141
140 1.634 1.416 1.177
145 1.671 1.448 1.212
150 1.708 1.480 1.248
155 1.745 1.512 1.282
160 1.783 1.544 1.311
165 1.820 1.576 1.340
170 1.857 1.607 1.369
175 1.639 1.398
180 1.671 1.427
185 1.703 1.456
190 1.735 1.485
195 1.767 1.514
200 1.799 1.543
205 1.830 1.572
210 1.862 1.602
215 1.631
220 1.660
225 1.689
230 1.718
235 1.747
240 1.776
245 1.805
250 1.834
255 1.863
260
265
270
275
280
285
290
295
300
305
310
315
320
325
330
335
340
Table 9: I-Section Beams 120 Minutes
Thickness (mm) Required for a Design Temperature of
Thickness is intumescent only.
Page 22 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
50 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
55 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
60 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
65 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
70 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
75 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
80 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
85 0.144 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
90 0.156 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
95 0.167 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
100 0.179 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
105 0.190 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
110 0.202 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
115 0.213 0.145 0.141 0.141 0.141 0.141 0.141 0.141 0.141
120 0.225 0.149 0.141 0.141 0.141 0.141 0.141 0.141 0.141
125 0.236 0.153 0.141 0.141 0.141 0.141 0.141 0.141 0.141
130 0.248 0.158 0.141 0.141 0.141 0.141 0.141 0.141 0.141
135 0.259 0.162 0.141 0.141 0.141 0.141 0.141 0.141 0.141
140 0.271 0.167 0.141 0.141 0.141 0.141 0.141 0.141 0.141
145 0.276 0.171 0.141 0.141 0.141 0.141 0.141 0.141 0.141
150 0.282 0.175 0.141 0.141 0.141 0.141 0.141 0.141 0.141
155 0.287 0.180 0.141 0.141 0.141 0.141 0.141 0.141 0.141
160 0.293 0.184 0.141 0.141 0.141 0.141 0.141 0.141 0.141
165 0.298 0.188 0.145 0.141 0.141 0.141 0.141 0.141 0.141
170 0.304 0.193 0.150 0.141 0.141 0.141 0.141 0.141 0.141
175 0.309 0.197 0.155 0.141 0.141 0.141 0.141 0.141 0.141
180 0.315 0.202 0.160 0.141 0.141 0.141 0.141 0.141 0.141
185 0.320 0.206 0.165 0.141 0.141 0.141 0.141 0.141 0.141
190 0.326 0.210 0.169 0.141 0.141 0.141 0.141 0.141 0.141
195 0.331 0.215 0.174 0.141 0.141 0.141 0.141 0.141 0.141
200 0.336 0.219 0.179 0.141 0.141 0.141 0.141 0.141 0.141
205 0.342 0.224 0.184 0.141 0.141 0.141 0.141 0.141 0.141
210 0.347 0.228 0.189 0.141 0.141 0.141 0.141 0.141 0.141
215 0.353 0.232 0.194 0.141 0.141 0.141 0.141 0.141 0.141
220 0.358 0.237 0.199 0.141 0.141 0.141 0.141 0.141 0.141
225 0.364 0.241 0.204 0.141 0.141 0.141 0.141 0.141 0.141
230 0.369 0.246 0.209 0.141 0.141 0.141 0.141 0.141 0.141
235 0.375 0.250 0.213 0.141 0.141 0.141 0.141 0.141 0.141
240 0.380 0.254 0.218 0.141 0.141 0.141 0.141 0.141 0.141
245 0.386 0.259 0.223 0.141 0.141 0.141 0.141 0.141 0.141
250 0.391 0.263 0.228 0.141 0.141 0.141 0.141 0.141 0.141
255 0.396 0.267 0.233 0.141 0.141 0.141 0.141 0.141 0.141
260 0.402 0.273 0.238 0.141 0.141 0.141 0.141 0.141 0.141
265 0.407 0.282 0.243 0.151 0.141 0.141 0.141 0.141 0.141
270 0.413 0.292 0.248 0.162 0.141 0.141 0.141 0.141 0.141
275 0.418 0.301 0.252 0.173 0.141 0.141 0.141 0.141 0.141
280 0.424 0.310 0.257 0.184 0.141 0.141 0.141 0.141 0.141
285 0.429 0.320 0.262 0.195 0.141 0.141 0.141 0.141 0.141
290 0.435 0.329 0.267 0.206 0.141 0.141 0.141 0.141 0.141
295 0.440 0.339 0.273 0.217 0.150 0.141 0.141 0.141 0.141
300 0.445 0.348 0.284 0.227 0.163 0.141 0.141 0.141 0.141
305 0.451 0.357 0.295 0.238 0.177 0.141 0.141 0.141 0.141
310 0.456 0.367 0.305 0.249 0.190 0.141 0.141 0.141 0.141
315 0.462 0.376 0.316 0.260 0.204 0.141 0.141 0.141 0.141
320 0.467 0.386 0.327 0.271 0.217 0.155 0.141 0.141 0.141
325 0.473 0.395 0.337 0.283 0.231 0.170 0.141 0.141 0.141
330 0.478 0.404 0.348 0.295 0.244 0.186 0.141 0.141 0.141
335 0.484 0.414 0.359 0.307 0.258 0.201 0.146 0.141 0.141
340 0.489 0.423 0.369 0.319 0.271 0.216 0.163 0.141 0.141
345 0.495 0.432 0.380 0.331 0.284 0.231 0.180 0.141 0.141
350 0.500 0.442 0.391 0.343 0.298 0.247 0.197 0.141 0.141
355 0.526 0.451 0.402 0.355 0.311 0.262 0.214 0.141 0.141
360 0.553 0.461 0.412 0.367 0.325 0.277 0.231 0.141 0.141
365 0.579 0.470 0.423 0.379 0.338 0.292 0.247 0.141 0.141
370 0.605 0.479 0.434 0.392 0.352 0.308 0.264 0.141 0.141
375 0.631 0.489 0.444 0.404 0.365 0.323 0.281 0.141 0.141
380 0.658 0.498 0.455 0.416 0.379 0.338 0.298 0.141 0.141
385 0.684 0.526 0.466 0.428 0.392 0.353 0.315 0.141 0.141
390 0.710 0.557 0.476 0.440 0.406 0.369 0.332 0.290 0.141
Thickness (mm) Required for a Design Temperature of
Table 10: I-Section Columns 15 Minutes
Thickness is intumescent only.
Page 23 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
50 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
55 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
60 0.161 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
65 0.192 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
70 0.222 0.141 0.141 0.141 0.141 0.141 0.141 0.141 0.141
75 0.253 0.149 0.141 0.141 0.141 0.141 0.141 0.141 0.141
80 0.277 0.164 0.141 0.141 0.141 0.141 0.141 0.141 0.141
85 0.293 0.180 0.141 0.141 0.141 0.141 0.141 0.141 0.141
90 0.309 0.195 0.141 0.141 0.141 0.141 0.141 0.141 0.141
95 0.324 0.210 0.148 0.141 0.141 0.141 0.141 0.141 0.141
100 0.340 0.225 0.154 0.141 0.141 0.141 0.141 0.141 0.141
105 0.356 0.241 0.161 0.141 0.141 0.141 0.141 0.141 0.141
110 0.371 0.256 0.167 0.141 0.141 0.141 0.141 0.141 0.141
115 0.387 0.271 0.174 0.141 0.141 0.141 0.141 0.141 0.141
120 0.403 0.276 0.180 0.142 0.141 0.141 0.141 0.141 0.141
125 0.418 0.281 0.187 0.146 0.141 0.141 0.141 0.141 0.141
130 0.434 0.286 0.194 0.151 0.141 0.141 0.141 0.141 0.141
135 0.450 0.291 0.200 0.155 0.141 0.141 0.141 0.141 0.141
140 0.465 0.296 0.207 0.159 0.141 0.141 0.141 0.141 0.141
145 0.481 0.301 0.213 0.164 0.141 0.141 0.141 0.141 0.141
150 0.497 0.306 0.220 0.168 0.141 0.141 0.141 0.141 0.141
155 0.505 0.312 0.226 0.172 0.141 0.141 0.141 0.141 0.141
160 0.511 0.317 0.233 0.176 0.141 0.141 0.141 0.141 0.141
165 0.517 0.322 0.240 0.181 0.141 0.141 0.141 0.141 0.141
170 0.524 0.327 0.246 0.185 0.143 0.141 0.141 0.141 0.141
175 0.530 0.332 0.253 0.189 0.148 0.141 0.141 0.141 0.141
180 0.536 0.337 0.259 0.193 0.153 0.141 0.141 0.141 0.141
185 0.542 0.342 0.266 0.198 0.158 0.141 0.141 0.141 0.141
190 0.549 0.347 0.272 0.202 0.164 0.141 0.141 0.141 0.141
195 0.555 0.352 0.279 0.206 0.169 0.141 0.141 0.141 0.141
200 0.561 0.357 0.285 0.210 0.174 0.141 0.141 0.141 0.141
205 0.567 0.362 0.292 0.215 0.179 0.141 0.141 0.141 0.141
210 0.574 0.367 0.298 0.219 0.184 0.141 0.141 0.141 0.141
215 0.580 0.372 0.305 0.223 0.190 0.141 0.141 0.141 0.141
220 0.586 0.377 0.311 0.227 0.195 0.141 0.141 0.141 0.141
225 0.592 0.382 0.318 0.232 0.200 0.141 0.141 0.141 0.141
230 0.598 0.388 0.324 0.236 0.205 0.141 0.141 0.141 0.141
235 0.605 0.393 0.331 0.240 0.211 0.141 0.141 0.141 0.141
240 0.611 0.398 0.337 0.245 0.216 0.141 0.141 0.141 0.141
245 0.617 0.403 0.343 0.249 0.221 0.141 0.141 0.141 0.141
250 0.623 0.408 0.350 0.253 0.226 0.141 0.141 0.141 0.141
255 0.630 0.413 0.356 0.257 0.231 0.141 0.141 0.141 0.141
260 0.636 0.418 0.363 0.262 0.237 0.141 0.141 0.141 0.141
265 0.642 0.423 0.369 0.266 0.242 0.141 0.141 0.141 0.141
270 0.648 0.428 0.376 0.270 0.247 0.149 0.141 0.141 0.141
275 0.655 0.433 0.382 0.279 0.252 0.163 0.141 0.141 0.141
280 0.661 0.438 0.389 0.289 0.257 0.177 0.141 0.141 0.141
285 0.667 0.443 0.395 0.300 0.263 0.192 0.150 0.141 0.141
290 0.673 0.448 0.402 0.310 0.268 0.206 0.163 0.141 0.141
295 0.679 0.453 0.408 0.320 0.275 0.220 0.177 0.141 0.141
300 0.686 0.458 0.415 0.330 0.287 0.234 0.190 0.141 0.141
305 0.692 0.464 0.421 0.341 0.298 0.248 0.204 0.147 0.141
310 0.698 0.469 0.428 0.351 0.309 0.262 0.217 0.163 0.141
315 0.704 0.474 0.434 0.361 0.320 0.276 0.231 0.178 0.141
320 0.711 0.479 0.440 0.371 0.331 0.288 0.244 0.193 0.141
325 0.717 0.484 0.447 0.381 0.342 0.301 0.258 0.208 0.141
330 0.723 0.489 0.453 0.392 0.353 0.313 0.271 0.223 0.158
335 0.729 0.494 0.460 0.402 0.364 0.325 0.284 0.238 0.175
340 0.736 0.499 0.466 0.412 0.375 0.337 0.298 0.253 0.192
345 0.742 0.521 0.473 0.422 0.387 0.350 0.311 0.268 0.209
350 0.748 0.546 0.479 0.433 0.398 0.362 0.325 0.283 0.227
355 0.754 0.572 0.486 0.443 0.409 0.374 0.338 0.298 0.244
360 0.761 0.598 0.492 0.453 0.420 0.387 0.352 0.313 0.261
365 0.767 0.624 0.499 0.463 0.431 0.399 0.365 0.328 0.278
370 0.848 0.649 0.524 0.473 0.442 0.411 0.379 0.343 0.295
375 0.948 0.675 0.554 0.484 0.453 0.424 0.392 0.358 0.312
380 1.048 0.701 0.583 0.494 0.464 0.436 0.406 0.373 0.329
385 1.149 0.727 0.613 0.513 0.476 0.448 0.419 0.389 0.346
390 1.249 0.753 0.643 0.546 0.487 0.461 0.433 0.404 0.363
Thickness (mm) Required for a Design Temperature of
Table 11: I-Section Columns 20 Minutes
Thickness is intumescent only.
Page 24 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
50 0.368 0.249 0.143 0.141 0.141 0.141 0.141 0.141 0.141
55 0.415 0.279 0.173 0.141 0.141 0.141 0.141 0.141 0.141
60 0.462 0.309 0.204 0.141 0.141 0.141 0.141 0.141 0.141
65 0.504 0.339 0.234 0.156 0.141 0.141 0.141 0.141 0.141
70 0.526 0.369 0.265 0.174 0.141 0.141 0.141 0.141 0.141
75 0.548 0.398 0.284 0.192 0.145 0.141 0.141 0.141 0.141
80 0.569 0.428 0.301 0.210 0.155 0.141 0.141 0.141 0.141
85 0.591 0.458 0.318 0.228 0.165 0.141 0.141 0.141 0.141
90 0.612 0.488 0.335 0.246 0.175 0.143 0.141 0.141 0.141
95 0.634 0.505 0.352 0.264 0.186 0.148 0.141 0.141 0.141
100 0.656 0.514 0.369 0.276 0.196 0.153 0.141 0.141 0.141
105 0.677 0.523 0.386 0.285 0.206 0.158 0.141 0.141 0.141
110 0.699 0.531 0.402 0.293 0.216 0.163 0.141 0.141 0.141
115 0.720 0.540 0.419 0.302 0.226 0.169 0.141 0.141 0.141
120 0.742 0.549 0.436 0.310 0.236 0.174 0.144 0.141 0.141
125 0.764 0.557 0.453 0.318 0.247 0.179 0.148 0.141 0.141
130 0.779 0.566 0.470 0.327 0.257 0.184 0.152 0.141 0.141
135 0.793 0.575 0.487 0.335 0.267 0.189 0.157 0.141 0.141
140 0.807 0.584 0.501 0.344 0.274 0.194 0.161 0.141 0.141
145 0.821 0.592 0.507 0.352 0.280 0.200 0.165 0.141 0.141
150 0.835 0.601 0.513 0.361 0.285 0.205 0.169 0.141 0.141
155 0.848 0.610 0.519 0.369 0.291 0.210 0.174 0.141 0.141
160 0.862 0.618 0.525 0.378 0.296 0.215 0.178 0.141 0.141
165 0.876 0.627 0.531 0.386 0.301 0.220 0.182 0.141 0.141
170 0.890 0.636 0.536 0.395 0.307 0.226 0.187 0.141 0.141
175 0.904 0.644 0.542 0.403 0.312 0.231 0.191 0.141 0.141
180 0.918 0.653 0.548 0.412 0.318 0.236 0.195 0.143 0.141
185 0.932 0.662 0.554 0.420 0.323 0.241 0.199 0.149 0.141
190 0.945 0.671 0.560 0.429 0.329 0.246 0.204 0.155 0.141
195 0.959 0.679 0.566 0.437 0.334 0.251 0.208 0.161 0.141
200 0.973 0.688 0.572 0.446 0.339 0.257 0.212 0.167 0.141
205 0.987 0.697 0.578 0.454 0.345 0.262 0.216 0.173 0.141
210 1.001 0.705 0.583 0.463 0.350 0.267 0.221 0.179 0.141
215 1.015 0.714 0.589 0.471 0.356 0.273 0.225 0.185 0.141
220 1.029 0.723 0.595 0.480 0.361 0.280 0.229 0.191 0.141
225 1.042 0.731 0.601 0.488 0.367 0.288 0.233 0.197 0.141
230 1.056 0.740 0.607 0.497 0.372 0.296 0.238 0.203 0.141
235 1.070 0.749 0.613 0.505 0.377 0.304 0.242 0.209 0.141
240 1.084 0.758 0.619 0.514 0.383 0.312 0.246 0.215 0.141
245 1.098 0.766 0.625 0.523 0.388 0.319 0.251 0.221 0.141
250 1.112 0.787 0.630 0.532 0.394 0.327 0.255 0.227 0.141
255 1.126 0.812 0.636 0.540 0.399 0.335 0.259 0.233 0.141
260 1.139 0.836 0.642 0.549 0.404 0.343 0.263 0.239 0.147
265 1.153 0.860 0.648 0.558 0.410 0.350 0.268 0.245 0.160
270 1.167 0.884 0.654 0.567 0.415 0.358 0.273 0.251 0.174
275 1.181 0.909 0.660 0.575 0.421 0.366 0.284 0.257 0.187
280 1.195 0.933 0.666 0.584 0.426 0.374 0.295 0.263 0.200
285 1.209 0.957 0.672 0.593 0.432 0.382 0.306 0.269 0.213
290 1.223 0.981 0.677 0.602 0.437 0.389 0.317 0.278 0.226
295 1.237 1.006 0.683 0.610 0.442 0.397 0.328 0.290 0.239
300 1.250 1.030 0.689 0.619 0.448 0.405 0.339 0.302 0.253
305 1.264 1.054 0.695 0.628 0.453 0.413 0.350 0.314 0.266
310 1.278 1.079 0.701 0.637 0.459 0.421 0.361 0.326 0.279
315 1.292 1.103 0.707 0.645 0.464 0.428 0.372 0.338 0.292
320 1.306 1.127 0.713 0.654 0.470 0.436 0.383 0.350 0.305
325 1.320 1.151 0.719 0.663 0.475 0.444 0.394 0.362 0.318
330 1.334 1.176 0.725 0.672 0.480 0.452 0.405 0.374 0.332
335 1.347 1.200 0.730 0.680 0.486 0.459 0.416 0.386 0.345
340 1.361 1.224 0.736 0.689 0.491 0.467 0.427 0.397 0.358
345 1.375 1.248 0.742 0.698 0.497 0.475 0.438 0.409 0.371
350 1.389 1.273 0.748 0.707 0.511 0.483 0.449 0.421 0.384
355 1.515 1.297 0.754 0.715 0.538 0.491 0.460 0.433 0.397
360 1.641 1.321 0.760 0.724 0.564 0.498 0.471 0.445 0.411
365 1.766 1.345 0.766 0.733 0.591 0.522 0.482 0.457 0.424
370 1.892 1.370 0.846 0.742 0.618 0.550 0.493 0.469 0.437
375 2.018 1.426 0.975 0.750 0.645 0.578 0.512 0.481 0.450
380 1.611 1.104 0.759 0.672 0.606 0.542 0.493 0.463
385 1.796 1.234 0.768 0.698 0.634 0.571 0.512 0.476
390 1.981 1.363 0.931 0.725 0.662 0.601 0.544 0.489
Thickness (mm) Required for a Design Temperature of
Table 12: I-Section Columns 30 Minutes
Thickness is intumescent only.
Page 25 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
50 0.677 0.553 0.481 0.331 0.231 0.163 0.141 0.141 0.141
55 0.734 0.583 0.500 0.373 0.264 0.188 0.142 0.141 0.141
60 0.791 0.614 0.519 0.415 0.298 0.212 0.159 0.141 0.141
65 0.850 0.645 0.538 0.458 0.332 0.237 0.176 0.141 0.141
70 0.909 0.676 0.557 0.500 0.365 0.261 0.193 0.149 0.141
75 0.967 0.706 0.577 0.510 0.399 0.285 0.210 0.160 0.141
80 1.026 0.737 0.596 0.521 0.433 0.309 0.227 0.171 0.141
85 1.084 0.768 0.615 0.531 0.466 0.333 0.244 0.182 0.141
90 1.143 0.794 0.634 0.542 0.500 0.357 0.261 0.193 0.142
95 1.202 0.819 0.653 0.552 0.505 0.381 0.277 0.203 0.148
100 1.260 0.845 0.672 0.562 0.510 0.405 0.292 0.214 0.153
105 1.319 0.871 0.691 0.573 0.515 0.428 0.307 0.225 0.159
110 1.377 0.896 0.711 0.583 0.520 0.452 0.322 0.236 0.165
115 1.408 0.922 0.730 0.593 0.525 0.476 0.337 0.247 0.170
120 1.431 0.948 0.749 0.604 0.530 0.500 0.352 0.258 0.176
125 1.454 0.973 0.768 0.614 0.535 0.505 0.367 0.269 0.181
130 1.478 0.999 0.782 0.625 0.540 0.511 0.382 0.278 0.187
135 1.501 1.025 0.796 0.635 0.546 0.516 0.398 0.286 0.193
140 1.524 1.050 0.810 0.645 0.551 0.522 0.413 0.295 0.198
145 1.547 1.076 0.824 0.656 0.556 0.527 0.428 0.303 0.204
150 1.571 1.102 0.838 0.666 0.561 0.532 0.443 0.311 0.209
155 1.594 1.127 0.852 0.677 0.566 0.538 0.458 0.320 0.215
160 1.617 1.153 0.866 0.687 0.571 0.543 0.473 0.328 0.221
165 1.641 1.179 0.880 0.697 0.576 0.548 0.488 0.337 0.226
170 1.664 1.204 0.894 0.708 0.581 0.554 0.501 0.345 0.232
175 1.687 1.230 0.908 0.718 0.586 0.559 0.508 0.354 0.237
180 1.710 1.256 0.923 0.729 0.591 0.565 0.514 0.362 0.243
185 1.734 1.281 0.937 0.739 0.596 0.570 0.520 0.370 0.249
190 1.757 1.307 0.951 0.749 0.601 0.575 0.527 0.379 0.254
195 1.780 1.333 0.965 0.760 0.606 0.581 0.533 0.387 0.260
200 1.804 1.358 0.979 0.772 0.611 0.586 0.539 0.396 0.265
205 1.827 1.384 0.993 0.791 0.616 0.591 0.546 0.404 0.271
210 1.850 1.407 1.007 0.810 0.621 0.597 0.552 0.412 0.279
215 1.874 1.429 1.021 0.829 0.626 0.602 0.558 0.421 0.287
220 1.897 1.452 1.035 0.848 0.631 0.608 0.564 0.429 0.295
225 1.920 1.474 1.049 0.867 0.637 0.613 0.571 0.438 0.303
230 1.943 1.497 1.063 0.886 0.642 0.618 0.577 0.446 0.310
235 1.967 1.519 1.077 0.905 0.647 0.624 0.583 0.455 0.318
240 1.990 1.542 1.091 0.924 0.652 0.629 0.590 0.463 0.326
245 2.013 1.564 1.105 0.943 0.657 0.635 0.596 0.471 0.334
250 2.037 1.587 1.119 0.962 0.662 0.640 0.602 0.480 0.342
255 2.060 1.609 1.133 0.981 0.667 0.645 0.609 0.488 0.350
260 1.632 1.147 1.000 0.672 0.651 0.615 0.497 0.358
265 1.654 1.161 1.019 0.677 0.656 0.621 0.506 0.366
270 1.677 1.175 1.038 0.682 0.661 0.628 0.517 0.374
275 1.699 1.189 1.058 0.687 0.667 0.634 0.527 0.382
280 1.721 1.204 1.077 0.692 0.672 0.640 0.537 0.389
285 1.744 1.218 1.096 0.697 0.678 0.647 0.548 0.397
290 1.766 1.232 1.115 0.702 0.683 0.653 0.558 0.405
295 1.789 1.246 1.134 0.707 0.688 0.659 0.569 0.413
300 1.811 1.260 1.153 0.712 0.694 0.666 0.579 0.421
305 1.834 1.274 1.172 0.717 0.699 0.672 0.589 0.429
310 1.856 1.288 1.191 0.722 0.704 0.678 0.600 0.437
315 1.879 1.302 1.210 0.728 0.710 0.685 0.610 0.445
320 1.901 1.316 1.229 0.733 0.715 0.691 0.620 0.453
325 1.924 1.330 1.248 0.738 0.721 0.697 0.631 0.461
330 1.946 1.344 1.267 0.743 0.726 0.704 0.641 0.468
335 1.969 1.358 1.286 0.748 0.731 0.710 0.652 0.476
340 1.991 1.372 1.305 0.753 0.737 0.716 0.662 0.484
345 2.014 1.386 1.324 0.758 0.742 0.722 0.672 0.492
350 2.036 1.557 1.343 0.763 0.748 0.729 0.683 0.500
355 2.058 1.766 1.362 0.768 0.753 0.735 0.693 0.526
360 1.976 1.381 0.923 0.758 0.741 0.704 0.552
365 1.561 1.079 0.764 0.748 0.714 0.577
370 1.846 1.234 0.807 0.754 0.724 0.603
375 1.389 1.001 0.760 0.735 0.629
380 1.782 1.195 0.767 0.745 0.655
385 1.389 0.945 0.756 0.680
390 1.913 1.167 0.766 0.706
Thickness (mm) Required for a Design Temperature of
Table 13: I-Section Columns 45 Minutes
Thickness is intumescent only.
Page 26 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
50 1.389 1.347 0.640 0.563 0.505 0.480 0.248 0.195 0.141
55 1.389 1.347 0.675 0.588 0.523 0.491 0.301 0.219 0.153
60 1.389 1.347 0.711 0.612 0.540 0.502 0.353 0.243 0.171
65 1.347 0.747 0.636 0.558 0.514 0.406 0.266 0.188
70 1.347 0.786 0.661 0.575 0.525 0.458 0.304 0.205
75 1.347 0.831 0.685 0.593 0.536 0.501 0.345 0.223
80 1.347 0.876 0.710 0.610 0.548 0.508 0.386 0.240
85 1.347 0.921 0.734 0.628 0.559 0.514 0.426 0.257
90 1.382 0.966 0.758 0.645 0.570 0.521 0.467 0.276
95 1.417 1.011 0.782 0.663 0.582 0.527 0.501 0.302
100 1.452 1.056 0.807 0.680 0.593 0.534 0.506 0.327
105 1.487 1.101 0.831 0.698 0.604 0.540 0.511 0.352
110 1.522 1.146 0.855 0.715 0.616 0.547 0.516 0.378
115 1.557 1.191 0.879 0.733 0.627 0.553 0.521 0.403
120 1.592 1.236 0.903 0.750 0.639 0.560 0.526 0.429
125 1.627 1.281 0.927 0.768 0.650 0.566 0.531 0.454
130 1.662 1.326 0.951 0.782 0.661 0.573 0.536 0.480
135 1.697 1.371 0.975 0.796 0.673 0.579 0.541 0.501
140 1.731 1.405 0.999 0.811 0.684 0.586 0.546 0.507
145 1.766 1.432 1.023 0.825 0.695 0.592 0.551 0.512
150 1.801 1.459 1.047 0.839 0.707 0.599 0.556 0.518
155 1.836 1.487 1.071 0.853 0.718 0.605 0.561 0.523
160 1.871 1.514 1.095 0.868 0.729 0.612 0.566 0.529
165 1.906 1.541 1.119 0.882 0.741 0.618 0.571 0.534
170 1.941 1.568 1.143 0.896 0.752 0.625 0.576 0.540
175 1.976 1.595 1.168 0.910 0.763 0.631 0.581 0.546
180 2.011 1.622 1.192 0.925 0.778 0.638 0.586 0.551
185 2.046 1.649 1.216 0.939 0.796 0.644 0.591 0.557
190 1.676 1.240 0.953 0.813 0.651 0.596 0.562
195 1.704 1.264 0.967 0.831 0.657 0.601 0.568
200 1.731 1.288 0.982 0.848 0.664 0.606 0.573
205 1.758 1.312 0.996 0.866 0.670 0.611 0.579
210 1.785 1.336 1.010 0.883 0.677 0.616 0.585
215 1.812 1.360 1.024 0.901 0.683 0.621 0.590
220 1.839 1.384 1.039 0.918 0.690 0.626 0.596
225 1.866 1.410 1.053 0.935 0.696 0.631 0.601
230 1.893 1.437 1.067 0.953 0.703 0.636 0.607
235 1.920 1.463 1.081 0.970 0.709 0.641 0.612
240 1.948 1.489 1.096 0.988 0.716 0.646 0.618
245 1.975 1.516 1.110 1.005 0.722 0.651 0.623
250 2.002 1.542 1.124 1.023 0.729 0.656 0.629
255 2.029 1.569 1.138 1.040 0.735 0.661 0.635
260 2.056 1.595 1.153 1.058 0.742 0.666 0.640
265 1.622 1.167 1.075 0.748 0.671 0.646
270 1.648 1.181 1.092 0.755 0.676 0.651
275 1.674 1.195 1.110 0.761 0.681 0.657
280 1.701 1.210 1.127 0.768 0.686 0.662
285 1.727 1.224 1.145 0.804 0.691 0.668
290 1.754 1.238 1.162 0.840 0.696 0.673
295 1.780 1.252 1.180 0.876 0.701 0.679
300 1.807 1.267 1.197 0.912 0.706 0.685
305 1.833 1.281 1.215 0.949 0.711 0.690
310 1.859 1.295 1.232 0.985 0.716 0.696
315 1.886 1.309 1.249 1.021 0.721 0.701
320 1.912 1.323 1.267 1.057 0.726 0.707
325 1.939 1.338 1.284 1.093 0.731 0.712
330 1.965 1.352 1.302 1.129 0.736 0.718
335 1.992 1.366 1.319 1.165 0.741 0.724
340 2.018 1.380 1.337 1.201 0.746 0.729
345 2.044 1.529 1.354 1.237 0.751 0.735
350 2.071 1.878 1.372 1.273 0.756 0.740
355 1.389 1.310 0.761 0.746
360 1.838 1.346 0.766 0.751
365 1.382 0.901 0.757
370 1.892 1.123 0.762
375 1.345 0.768
380 1.027
385 1.286
390
Thickness (mm) Required for a Design Temperature of
Table 14: I-Section Columns 60 Minutes
Thickness is intumescent only.
Page 27 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
50 1.389 1.311 0.703 0.624 0.570 0.517 0.484 0.309
55 1.389 1.311 0.703 0.653 0.592 0.534 0.495 0.309
60 1.311 0.768 0.681 0.614 0.551 0.507 0.309
65 1.311 0.833 0.710 0.636 0.567 0.519 0.373
70 1.311 0.897 0.739 0.658 0.584 0.530 0.436
75 1.355 0.962 0.768 0.680 0.601 0.542 0.500
80 1.398 1.027 0.809 0.702 0.618 0.554 0.506
85 1.441 1.091 0.851 0.724 0.634 0.565 0.513
90 1.484 1.156 0.892 0.746 0.651 0.577 0.519
95 1.527 1.221 0.934 0.768 0.668 0.589 0.525
100 1.570 1.286 0.975 0.793 0.684 0.600 0.532
105 1.613 1.350 1.016 0.818 0.701 0.612 0.538
110 1.656 1.403 1.058 0.843 0.718 0.624 0.544
115 1.699 1.440 1.099 0.868 0.735 0.635 0.551
120 1.742 1.476 1.141 0.893 0.751 0.647 0.557
125 1.785 1.512 1.182 0.918 0.768 0.658 0.563
130 1.828 1.548 1.223 0.943 0.782 0.670 0.570
135 1.872 1.584 1.265 0.968 0.797 0.682 0.576
140 1.915 1.620 1.306 0.993 0.811 0.693 0.582
145 1.958 1.657 1.348 1.018 0.826 0.705 0.588
150 2.001 1.693 1.389 1.043 0.840 0.717 0.595
155 2.044 1.729 1.421 1.068 0.854 0.728 0.601
160 1.765 1.453 1.094 0.869 0.740 0.607
165 1.801 1.485 1.119 0.883 0.752 0.614
170 1.837 1.517 1.144 0.897 0.763 0.620
175 1.873 1.549 1.169 0.912 0.778 0.626
180 1.910 1.582 1.194 0.926 0.796 0.633
185 1.946 1.614 1.219 0.941 0.813 0.639
190 1.982 1.646 1.244 0.955 0.830 0.645
195 2.018 1.678 1.269 0.969 0.847 0.652
200 2.054 1.710 1.294 0.984 0.865 0.658
205 1.742 1.319 0.998 0.882 0.664
210 1.774 1.344 1.012 0.899 0.671
215 1.806 1.369 1.027 0.916 0.677
220 1.838 1.395 1.041 0.934 0.683
225 1.870 1.428 1.056 0.951 0.690
230 1.902 1.460 1.070 0.968 0.696
235 1.935 1.493 1.084 0.985 0.702
240 1.967 1.525 1.099 1.003 0.709
245 1.999 1.558 1.113 1.020 0.715
250 2.031 1.590 1.127 1.037 0.721
255 2.063 1.622 1.142 1.054 0.728
260 1.655 1.156 1.072 0.734
265 1.687 1.171 1.089 0.740
270 1.720 1.185 1.106 0.747
275 1.752 1.199 1.123 0.753
280 1.785 1.214 1.141 0.759
285 1.817 1.228 1.158 0.765
290 1.849 1.242 1.175 0.792
295 1.882 1.257 1.192 0.833
300 1.914 1.271 1.210 0.873
305 1.947 1.286 1.227 0.913
310 1.979 1.300 1.244 0.953
315 2.012 1.314 1.261 0.994
320 2.044 1.329 1.279 1.034
325 1.343 1.296 1.074
330 1.357 1.313 1.115
335 1.372 1.330 1.155
340 1.386 1.348 1.195
345 1.892 1.365 1.236
350 1.382 1.276
355 2.018 1.316
360 1.357
365 1.397
370 1.437
375 1.478
380 1.518
385
390
Thickness (mm) Required for a Design Temperature of
Table 15: I-Section Columns 75 Minutes
Thickness is intumescent only.
Page 28 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
50 1.389 1.389 1.328 0.768 0.731 0.559 0.494
55 1.389 1.389 1.328 0.768 0.731 0.579 0.509
60 1.389 1.328 0.768 0.731 0.600 0.524
65 1.389 1.328 0.768 0.731 0.620 0.540
70 1.389 1.328 0.824 0.731 0.641 0.555
75 1.328 0.881 0.731 0.661 0.570
80 1.328 0.937 0.768 0.682 0.585
85 1.328 0.994 0.805 0.702 0.601
90 1.372 1.050 0.843 0.723 0.616
95 1.415 1.107 0.880 0.743 0.631
100 1.459 1.163 0.918 0.764 0.646
105 1.503 1.220 0.955 0.786 0.661
110 1.546 1.276 0.992 0.809 0.677
115 1.590 1.333 1.030 0.831 0.692
120 1.634 1.389 1.067 0.854 0.707
125 1.677 1.428 1.105 0.877 0.722
130 1.721 1.468 1.142 0.899 0.738
135 1.765 1.507 1.180 0.922 0.753
140 1.808 1.546 1.217 0.945 0.768
145 1.852 1.586 1.254 0.967 0.783
150 1.896 1.625 1.292 0.990 0.798
155 1.939 1.664 1.329 1.013 0.814
160 1.983 1.704 1.367 1.035 0.829
165 2.027 1.743 1.404 1.058 0.844
170 2.070 1.782 1.442 1.081 0.859
175 1.821 1.480 1.103 0.875
180 1.861 1.518 1.126 0.890
185 1.900 1.556 1.149 0.905
190 1.939 1.594 1.171 0.920
195 1.979 1.632 1.194 0.935
200 2.018 1.669 1.217 0.951
205 2.057 1.707 1.239 0.966
210 1.745 1.262 0.981
215 1.783 1.285 0.996
220 1.821 1.307 1.012
225 1.859 1.330 1.027
230 1.897 1.353 1.042
235 1.935 1.375 1.057
240 1.973 1.409 1.072
245 2.010 1.460 1.088
250 2.048 1.511 1.103
255 1.561 1.118
260 1.612 1.133
265 1.663 1.149
270 1.714 1.164
275 1.764 1.179
280 1.815 1.194
285 1.866 1.209
290 1.917 1.225
295 1.967 1.240
300 2.018 1.255
305 2.069 1.270
310 1.286
315 1.301
320 1.316
325 1.331
330 1.346
335 1.362
340 1.377
345 1.392
350 1.407
355 1.422
360 1.438
365 1.453
370 1.468
375 1.483
380 1.499
385 1.514
390 1.529
Thickness (mm) Required for a Design Temperature of
Table 16: I-Section Columns 90 Minutes
Thickness is intumescent only.
Page 29 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
50 1.389 1.369 0.713 0.700 0.576
55 1.389 1.369 0.713 0.700 0.599
60 1.389 1.369 0.782 0.700 0.622
65 1.389 1.369 0.851 0.700 0.644
70 1.369 0.920 0.749 0.667
75 1.369 0.989 0.797 0.690
80 1.369 1.058 0.846 0.713
85 1.418 1.127 0.894 0.736
90 1.468 1.196 0.943 0.759
95 1.517 1.265 0.991 0.786
100 1.566 1.334 1.040 0.815
105 1.615 1.398 1.088 0.844
110 1.664 1.442 1.137 0.873
115 1.713 1.486 1.185 0.903
120 1.762 1.531 1.234 0.932
125 1.812 1.575 1.282 0.961
130 1.861 1.619 1.331 0.991
135 1.910 1.664 1.379 1.020
140 1.959 1.708 1.424 1.049
145 2.008 1.752 1.469 1.079
150 2.057 1.797 1.513 1.108
155 1.841 1.557 1.137
160 1.885 1.602 1.166
165 1.929 1.646 1.196
170 1.974 1.690 1.225
175 2.018 1.735 1.254
180 2.062 1.779 1.284
185 1.823 1.313
190 1.867 1.342
195 1.912 1.371
200 1.956 1.416
205 2.000 1.483
210 2.045 1.550
215 1.617
220 1.683
225 1.750
230 1.817
235 1.884
240 1.951
245 2.018
250
255
260
265
270
275
280
285
290
295
300
305
310
315
320
325
330
335
340
345
350
355
360
365
370
375
380
385
390
Table 17: I-Section Columns 105 Minutes
Thickness (mm) Required for a Design Temperature of
Thickness is intumescent only.
Page 30 of 30
Section
Factor up
to m -1
350°C 400°C 450°C 500°C 550°C 600°C 650°C 700°C 750°C
50 1.389 1.389 0.752 0.670
55 1.389 1.389 0.752 0.670
60 1.389 1.389 0.832 0.670
65 1.389 0.911 0.724
70 1.389 0.991 0.779
75 1.389 1.071 0.833
80 1.150 0.888
85 1.230 0.942
90 1.309 0.997
95 1.389 1.051
100 1.439 1.106
105 1.489 1.160
110 1.539 1.215
115 1.589 1.269
120 1.639 1.324
125 1.689 1.378
130 1.738 1.432
135 1.788 1.487
140 1.838 1.541
145 1.888 1.595
150 1.938 1.649
155 1.988 1.704
160 2.038 1.758
165 1.812
170 1.866
175 1.920
180 1.975
185 2.029
Table 18: I-Section Columns 120 Minutes
Thickness (mm) Required for a Design Temperature of
Thickness is intumescent only.