Precast Flooring

PrecastFlooring

Hollowcore

Plate Flooring

T-Beams

Lattice Girder

UltraFloor

CI/SfB

UniclassL342

EPICC251:X22

(23) Ef2

PRECAST CONCRETE Acheson & Glover has beenmanufacturing concrete products for almost 50 years, developing an outstanding product rangecomplimented by a service tailored to meet our customers requirements.

Precast concrete offers all theadvantages of concrete whileeliminating many of the difficultiesassociated with on site casting such asweather considerations and extended duration of the construction period.

Precast concrete is cast and cured in a quality controlled environment,eliminating the need for on sitestorage and means it is exceptionallyresistant to impact, corrosion,weathering and abrasion, making it virtually maintenance free.

SERVICEAcheson & Glover Precast flooringoffers a complete support service.A professional in-house design team of over 30 designers and engineersprovide a comprehensive advisory

and design service to guide yourproject from concept to completion.You can rely on our experienced team.

ESTIMATINGOur team provides detailed, easy tofollow quotes to your requirements.

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Acheson & Glover has outstanding experience in the manufacture of precast concrete productsincluding prestressed hollowcore floors, stairs,landings, balconies, terrace units, ground beams and architectural panels.

www.acheson-glover.com

Coverage across the UK and Irelandis assured with the exceptionalspread of Acheson & Glovers Precast locations:

WELLS

WATERFORD

DUBLIN

NEWRY

MAGHERAFELT

BALLYGAWLEY

PrecastFlooring

TECHNICAL SUPPORTEach project is supported by a team of qualified engineers. To get the complete benefitof Acheson & Glover's technical service contact us early in the design process.

Full design supportA carefully considered, detailed design,at the start of the project will paydividends at each stage of the project,helping to prevent problemsthroughout the entire process.

A complete product range Sourcing flooring, beams, stairs,landings and panels from one

manufacturer ensures a fullyintegrated design with productsdetailed to work together.

Incorporating ServicesWe offer comprehensive guidance on how to incorporate the requiredservices into the structural elementsAcheson & Glover manufacture. Wecan incorporate design openings and

recesses accurately during themanufacturing stage resulting in less work on site.

DetailingAccurate details incorporated at thedesign stage ensure easy connectioninto any structure.

Acheson & Glovers technical support services will provide solutions for every problem 03

BELFAST GLASGOW

BIRMINGHAM

PRESTON

04 www.acheson-glover.com

Precast Floors What to use where:

FLOOR TYPE MOST ECONOMICAL FOR : MOST USEFUL WHERE :

T-Beam :erehw lufesUm4 rednu snapSSite access is poor - can be manually lifted

(Page 11) There are awkward shapesThere are a lot of services to accommodate Structure exists - can be accommodated in pocketsInternal walls only 100mm wide

Ultrafloor For spans 4m 5.5m Useful where: Cantilevers up to 1500mm are required

(Page 18) Airborne sound resistance of 300kg/m2 is neededCrane is being hired to install floor - smaller crane needed as only 600mm wide

Hollowcore Spans 5.6m - 18m Useful where: Cost is important - most economical span:depth ratio

(Page 05) Floor depth is important - achieves largest span with minimum depthCan be fitted into steel beams to reduce overall floor depthThere are specific requirements every floor is bespokeService openings are factory formedCan be manufactured to suit almost any structure: concrete, steel, block workEasily manufactured to suit unusual details & angles

Prestressed Plate Buildings over 4 stories Useful where: Buildings have a lot of external structural elements

(Page 12) There are high concentrated point loadsHA traffic loadings are requiredProgressive collapse detail is neededThere are structural elements such as beams & balconies to be tied inThe building is over 4 storiesA continuous floor design is needed

Lattice Girder Buildings with large openings Useful where: There are large openings to accommodate

(Page 16) A mechanical connection between floor plate and topping is desirable

Ultrafloor Hollowcore Prestressed Plate Lattice GirderT-Beam

Manufactured to BS8110 on heated steel beds in an enclosed, controlledfactory environment, with a 28 daycube strength of concrete in excess of50N/mm2, you can be confident of aconsistent quality product.

Each floor is designed to our customersexact specification. Service ducts,recesses and openings are designed into your floor and accuratelyincorported during manufacture.

HollowcoreAcheson & Glover prestressed Hollowcore flooring will take thestress out of flooring for you. Manufactured in depths rangingfrom 150mm - 500mm.

PrecastFlooring

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SAVES TIME Time consuming site operations such aspropping and shuttering wet concrete arevirtually eliminated thus having a positiveeffect on the construction project.

IMMEDIATE PLATFORM Once the Acheson & Glover floor unitshave been placed in position andgrouted, they provide an immediateworking platform for all follow-on trades.This reduces site delays to a minimum.

NO PROPPING In most cases propping is not requiredwith Hollowcore flooring, saving timeand money. The area below the floorremains free from congestion allowingother trades to progress unhindered.

DESIGN FLEXIBILITYPrestressed Hollowcore floors can bedesigned to suit a very wide range ofbuildings and meet most project criteria.

QUALITY FINISHState of the art manufacturing techniquesensure a quality finish. Direct decorationusing suitable materials is possible inmany projects.

DIAPHRAGM ACTIONOnce the Acheson & Glover units havebeen grouted they can be assumed to provide a floor providing fulldiaphragm action.

PRESTRESSED HOLLOWCORE FLOORING - A PROFESSIONAL CHOICE


400mm

500mm

When using maximum span consideration must be given to the effects of deflection, vibration and camber.FIGURES ARE FOR GUIDANCE ONLY PLEASE CONSULT OUR TECHNICAL TEAM FOR FULL DETAILS.

4.0m 16.0 15.3

4.5m 11.9 11.2 22.6 22.5

5.0m 9.0 8.3 17.6 17.5

5.5m 6.8 6.1 14.0 13.8 22.5

6.0m 5.1 4.5 11.1 11.0 18.2 28.6

6.5m 3.8 3.2 8.9 8.8 14.9 25.0

7.0m 2.3 7.2 7.0 12.2 22.6 32.0

7.5m 5.8 5.6 10.1 19.1 27.2

8.0m 4.5 4.3 8.2 16.3 23.4

8.5m 2.8 2.7 6.7 13.9 20.1

9.0m 5.5 11.9 17.4 33.8

9.5m 4.4 10.2 15.0 29.6

10.0m 3.5 8.7 13.0 26.1

10.5m 1.9 7.4 11.3 23.1

11.0m 6.3 9.8 20.4

11.5m 5.4 8.5 18.1

12.0m 4.5 7.4 16.1

12.5m 3.8 6.4 14.3

13.0m 2.7 5.5 12.7

13.5m 4.7 11.3

14.0m 4.0 10.1

14.5m 3.3 8.9

15.0m 2.7 7.9

15.5m 2.0 7.0

16.0m 6.1

16.5m 5.3

17.0m 4.6

17.5m 4.0

18.0m 3.4

ALLOWABLE HOLLOWCORE LIVE LOADS (kN/m2)Table indicates allowable characteristic live loads (allowance has been made for self weight of unit plus 1.8kN/m2 for finishes)

CLEA

R S

PAN

LEN

GTH

150mm 150mm HD 200mm 200mm HD 250mm 320mm 400mm 500mm

2.4kN/m2 3.0kN/m2 2.6kN/m2 2.9kN/m2 3.45kN/m2 3.9kN/m2 4.6kN/m2 6.3kN/m2UNIT SIZE

SELF WEIGHT

1200mm

150mm

200mm

250mm

320mm

1200mm

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COMPOSITE FLOORINGHollowcore flooring can be combined with an insitustructural concrete topping to form a composite slab.This allows the engineer to tie in other details such asbalconies, maximum load distribution and minimumstructural depth.

FINAL PRODUCT TESTINGIn addition to Acheson & Glovers commitment to useonly top quality raw materials, which are tested bothin-house and independently to confirm quality,Hollowcore floor units are routinely and randomlyselected from the production line and load tested for compliance using industry standard practices.

RESEARCH & DEVELOPMENTAcheson & Glover continually review products in light of both in-house and external research anddevelopment work which has been carried out onPrestressed Hollowcore units throughout Europe andbeyond. This helps ensure that we remain at theforefront of Hollowcore unit technology and thecustomer obtains the best utilization of our products.

150mm

75mmSTRUCTURAL CONCRETE

200mm


250mm


320mm


400mm


500mm


6.0m 10.1 9.3 16.7 18.5 27.9 28.8

7.0m 5.5 4.5 11.9 11.8 18.9 23.6 36.4

8.0m 2.5 7.5 7.3 12.6 21.4 30.8

9.0m 4.6 4.3 8.5 16.6 22.9 42.2

10.0m 2.5 2.1 5.5 12.2 17.2 33.0

11.0m 3.3 8.9 13.0 25.8

12.0m 6.4 9.8 20.4

13.0m 4.4 7.3 16.1

14.0m 2.9 5.3 12.7

15.0m 3.7 10.0

16.0m 2.3 7.8

17.0m 5.9

18.0m 4.3

CLEA

R SP

AN L

ENGT

H

150mm 150mm HD 200mm 200mm HD 250mm 320mm 400mm 500mm

4.2kN/m2 4.8kN/m2 4.4kN/m2 4.7kN/m2 5.25kN/m2 5.7kN/m2 6.4kN/m2 8.1kN/m2

225mm 225mm 275mm 275mm 325mm 395mm 475mm 575mmCOMPOSITE DEPTH

UNIT SIZE

SELF WEIGHT

ALLOWABLE HOLLOWCORE LIVE LOADS (kN/m2) FOR COMPOSITE HOLLOWCORE FLOORINGTable indicates allowable characteristic live loads (allowance has been made for self weight of unit plus 75mm structural topping)

1200mm

When using maximum span consideration must be given to the effects of deflection, vibration and camber.Other topping depths may be recommended or required in various situations.

FIGURES ARE FOR GUIDANCE ONLY PLEASE CONSULT OUR TECHNICAL TEAM FOR FULL DETAILS.


All bearings should be level and true with no debris. On masonry bearings there may be a requirementto provide a mortar bed, prior to the placement of units.

Hollowcore

NARROW BEARING ON STEEL

SIDE BEARING ON MASONRY

BEARING ON STEEL

BEARING ON SHELF ANGLE

CALCULATION OF MAXIMUM UNIT LENGTH

= c/c SUPPORT BEAMS - 1/2 MAX FLANGE WIDTH - 25mm TOLERANCE

NOTE

Checks should be made to ensure 75mm minimum net bearing

on shelf angle is achieved.

FINISHES BY MAIN CONTRACTOR

NORMAL BEARINGt/2 - TOLERANCE

FLANGE WIDTHt > 165mm

t

REBATED ENDS

MIN. 75mm BEARING

c/c support beams

MIN. 75mm BEARING

25mm

REBATED ENDS

SHELF ANGLE WITH MIN.150mm SUPPORT LEGGENERALLY

MIN. 75mm BEARING

25mm PROJECTION OF SHELF ANGLEBEYOND TOP FLANGE (MIN.)

MIN. 75mm BEARING

SHELF ANGLE WITH MIN.150mm SUPPORT LEGGENERALLY

FINISHES BY MAIN CONTRACTOR

CONTINUOUS WET MORTAR BYMAIN CONTRACTOR TO TAKE UP CAMBER

FINISHES BY MAINCONTRACTOR

STRUCTURAL CONCRETE INFILL BYMAIN CONTRACTOR

TIE REINFORCEMENT BY OTHERSAT 600 C/C IN JOINTS ANDFACTORY FORMED SLOTSPROVIDED IN 1200 WIDE UNITS.

NOMINAL BEARINGt/2 - TOLERANCE(MIN. 65mm)

FLANGE WIDTHt < 165mm

t

TOLERANCE TOLERANCE

BACK FILL TO FORM STOP END

VARIOUSDEPTHS

ALL STEEL AND INSITUCONCRETE ON SITE BY MAIN CONTRACTOR

BACK FILL TO FORM STOP END

SLOTS TO BE FORMED @ 600 c/cLATER FILLED ON SITE WITH 30N/mm2

CONCRETE BY MAIN CONTRACTOR

75 mm BEARING75 mm BEARING

VARIOUSDEPTHS

215mm

PrecastFlooring

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For full range of details speak to our technical department 028 8556 8441 or visit www.acheson-glover.com

PROGRESSIVE COLLAPSE DESIGN

SERVICE OPENINGSService Openings, with a diameter less than 75mm,can be created through units after installation bydrilling centrally through the cores. You must consultwith our design office before commencing this work.

Generally service openings up to 400mm wide in asingle standard unit width are permitted subject tosatisfying design criteria. These should be factoryformed.

Openings up to 1200mm can usually beaccommodated, subject to design criteria, usingstructural steel hangers supplied by Acheson & Gloverat an extra cost.

All service openings formed by Acheson & Glover are to be made good by the main contractor afterinstallation of service pipes etc.

Hollowcore units can be used for a collapsed design, please contactour technical department or consult our website for full details.

MILD STEEL HANGER

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FIRE RESISTANCEAcheson & Glover Prestressed Hollowcore floor units have a minimum 1 hour fire rating (BS8110 Section 4Table 4.9). Ratings of up to 2 hours can be achieveddepending on design criteria. Contact our technicaldepartment for details.

SOUND RESISTANCEAcheson & Glover Hollowcore floor units have a high resistance to both impact and airborne soundtransmission and contribute to satisfying the latestbuilding regulations.

FINISHESOur units are cast on heated steel casting beds,providing a high standard of finish, to Type A, Clause6.11.3 of BS8110, and are suitable in appropriate casesfor direct decoration. The soffit is suitable for directapplication of a textured paint finish where this isapplied in accordance with the manufacturers

instructions. Plaster finishes are not recommended onlonger spans, but where intended, it may be necessaryto use a bonding agent in accordance with plastermanufacturer instructions.

CAMBERPrestressed units have an inherent upward camber andappropriate allowance should be made in finishes tocater for this.

Camber should not normally exceed L/300.

Differential Cambers will arise with units of differentlengths or where changes in span direction occur.

CAMBER

L

Hollowcore Design Characteristics


PrecastFlooring

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Ideal for sites with poor access

Can easily accommodate awkward shapes

Easily accommodates services

Can be inserted into an existing structure

Available ex-stock in 50mm increments

*Alternate Blocks

2.7m 10.8 14.3 20.0 20.0 20.0

3.0m 8.4 11.3 16.1 20.0 20.0

3.3m 6.6 9.0 13.0 17.5 20.0

3.6m 5.2 7.2 10.6 14.4 20.0

3.9m 4.1 5.8 8.7 12.0 20.0

4.2m 3.3 4.7 7.2 10.0 19.3

4.5m 2.6 3.8 6.0 8.4 16.5

4.8m 2.0 3.1 4.9 7.0 14.1

5.1m 1.5 2.4 4.1 6.0 12.2

5.4m 1.1 1.9 3.4 5.0 10.5

5.7m 0.7 1.5 2.8 4.3 9.1

Load Table (Clear Span Safe loads on 150mm T-Beams and Blocks (kN/m2)Allowance has been made for self-weight of beams and standard 100mm 7N/mm2 blocks.

The weight of screeds and finishes must be deducted from the loadings shown.

SoundThe minimum density of theAcheson & Glover T-Beam andBlock Floor complete with 75mmbonded screed is 415kg/m2. This floor can therefore provideequivalent resistance to transmissionof airborne or impact sound, to a solid concrete floor.

DesignThe floors are designed by Acheson & Glover to supportloadings appropriate to theirintended use, eg. as dwellings or as offices. Generally we are alsoable to allow for non-loadbearingpartition walls in our design.Technical support is available from Acheson & Glover, who will be pleased to offer technical advice on any specific application.

T-Beam FloorThe Acheson & Glover T-Beam offers a cost effective structuralflooring option. It is particularly suitable where the infill depthexceeds 600mm and where a structural floor is required bybuilding control.

INFILL BLOCKS 440mm 440/220mm* 220mm 150mm none

BEAM CENTRES 520mm 410mm 300mm 230mm 130mm

SELF WEIGHT 2.35kN/m2 2.5kN/m2 2.6kN/m2 2.8kN/m2 3.6kN/m2

CLEA

R S

PAN

LEN

GTH

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Prestressed Plate FlooringThe Acheson & Glover prestressed plate flooring system isdesigned as a composite option. It is ideal where structuralelements such as balconies or beams need tied into the structure.Upstand ribs cast onto the plate flooring during manufacturecreate a very versatile system.


Does not require propping during installation- in most cases

Suitable for concentrated point loads

Suitable for HA/Traffic loadings

Easiest way of achieving progressivecollapse detail

No modification required for buildingsover four stories

Suitable for the creation of compositebeam designs with steel or concrete

Can achieve a continuous floor design

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As the system does not need propped, installation isfast and hassle free. The upstand ribs can be used tosupport the mesh at the correct level. The entirestructure can be completely decked before any concreteneeds to be poured giving you greater flexibility withinthe build programme.

Please contact our design office on 028 8556 8441 for full details.

On a steel frame the complete building can bedecked out without any insitu concrete which canbe poured to suit the programming of edge details.

STANDARD COMPOSITE SECTION

PLATE FLOOR UNIT

CONCRETE TOPPING ON SITEBY MAIN CONTRACTOR

ANTICRACKREINFORCEMENT BYMAIN CONTRACTOR

55mm

1200mm wide

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Plate Flooring


COMPOSITE STEEL BEAM DESIGN

COMPOSITE CONCRETE BEAM DESIGN

CANTILEVERED PLATE

PLATE FLOOR UNIT

CANTILEVERREINFORCEMENT BYMAIN CONTRACTOR

PLATE FLOOR UNIT

CONTINUITY STEELREINFORCEMENTBY MAIN CONTRACTOR

PLATE FLOOR UNIT

BEAM REINFORCEMENTBY MAIN CONTRACTOR



ANTICRACK REINFORCEMENTBY MAIN CONTRACTOR




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Height of Upstands (mm) - H 50 85 110 135 145 145

Thickness of Plate (mm) - T 55 55 55 55 55 55

Composite Depth (mm) 165 200 225 250 275 300

3.0m unpropped clear span 25 33 39 45 51 57



4.5m unpropped clear span 18 26 30 34 38



6.0m unpropped clear span 9 13 15 16

6.5m unpropped clear span 5 9 11 11

7.0m unpropped clear span 6 6 6

PRECAST COMPOSITE BALCONY

TYPICAL SECTION FOR COMPOSITE PRESTRESSED PLATE FLOOR

When using maximum span consideration must be given to the effects of deflection, vibration and camber.Greater clear spans can be achieved by mid-span temporary propping.

FIGURES ARE FOR GUIDANCE ONLY PLEASE CONSULT OUR TECHNICAL TEAM FOR FULL DETAILS.

ALLOWABLE FLOOR LIVE LOADS (kN/m2) FOR UNPROPPED COMPOSITE PLATE

TOP REINFORCEMENTBY MAIN CONTRACTOR

PLATE FLOOR UNIT

PRECASTBALCONYUNIT

CONCRETE TOPPINGON SITE BY MAIN

CONTRACTOR

ANTI-CRACK REINFORCEMENTBY MAIN CONTRACTOR

H

T

Table indicates allowablecharacteristic live loads for various upstandarrangements and platethickness using a 35N/mm2

insitu concrete topping(allowance has been made for self weight of composite unit).

220 210 2202103401200mm

A = Allowance for camber/mesh/cover to reinforcement (recommend minimum 60mm)

H&T = refers to the table above

B = 75mm nominal thickness (varies)

Anti-crackreinforcement inaccordance withBS8110

Concrete toppingC28/35 minimum

A

B

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Lattice Girder Plate FlooringWideslab and voidform - composite floors using lattice girdernormally consists of a temporarily propped precast plank, whichcontains most of the bottom reinforcement in addition to thelattice girder, which also acts as fully participating permanentformwork in conjunction with the insitu structural topping.

In situations where self weight must be minimised, the latticegirder planks can be supplied with polystyrene void-formersbonded to their upper surface. These are then incorporatedwithin the insitu topping.

Composite lattice girder floors can be designed to providediaphragm action to transmit horizontal forces to the primarysupporting structure.

2.4m wide units

Can accommodate large openings

Smooth flat soffit

Provides mechanical connection betweenplate & topping

Good option for irregular & curved shape buildings


PrecastFlooring

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A composite precast concrete floor that provides amechanical connection between the plate and the screed.

Like the prestressed plate floor, lattice girder floors aresuitable for high point loadings and traffic loadings.

A progressive collapse detail is easily achieved, structuralelements can be tied in and it is suitable for use in tall buildings.

The plank, which contains most of the reinforcement, mustbe temporarily propped while additional reinforcementis tied into the lattice girder and the topping added.

BEARINGSThe following recommendations should be followed:

1. Steelwork - 50mm

2. Concrete - 70mm

3. Masonry - 100mm

150mm 4.0 4.0 4.0 4.0 4.0 3.5 3.5 3.6 0.100

175mm 5.0 5.0 5.0 4.5 4.5 4.5 4.0 4.2 0.125

200mm 5.5 5.5 5.5 5.5 5.0 5.0 5.0 4.8 0.150

225mm 6.0 6.0 6.0 6.0 6.0 5.5 5.5 5.4 0.175

250mm 6.5 6.5 6.5 6.5 6.5 6.5 6.0 6.0 0.200

Total Depth Superimposed Loads (kN/m2) Self Weight Insitu Concreteof Slab 1.5 2.0 2.5 3.0 4.0 5.0 7.5 (kN/m2) Reqd. (m3/m2)

LOAD INFORMATION

Maximum spans for simply supported slabs

WIDESPAN PROFILE

VOIDFORM PROFILE

2400mm*

600mm

2400mm*

Insitu Concrete Lattice Girder Unit

Insitu Concrete Lattice Girder Unit

*Various widths available on request

400mm

When using maximum span consideration must be given to the effects of deflection, vibration and camber.FIGURES FOR GUIDANCE ONLY PLEASE CONSULT OUR TECHNICAL TEAM FOR FULL DETAILS.

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UltraFloorUltraFloor is a modular reinforced precast flooring system idealfor use in both domestic and smaller commercial projects.

UltraFloor provides the advantages of a concrete floor - improved soundinsulation, better fire performance, an ideal base for underfloor heatingand greater design flexibility, in a modular, off the shelf form.

The Acheson & Glover technical team will design the floor to give youoptimum performance. The standard width of UltraFloor is 600mm.

210mm

Dimensions


600mm

95mm

Ideal for creating stairwells,landings and internal balconies

Eliminates need for steel in moststairwells

Can cantilever up to 1500mmwithout additional cost

210mm deep same depth asblock for simple installation

Can support roof loadings in mostsituations eliminating the needfor steel beams

In most cases block work firstfloor walls do not have to besupported by ground floor walls

Simplifies foundations

Available ex-stock in 50mmincrements

PrecastFlooring

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TYPICAL LOADINGSSelf weight 300kg/m2 / 3kN/m2

Dead Loads100mm thick screed 2.4 kN/m2

Timber batten floor 0.3 kN/m2

Live LoadsDomestic 1.5 kN/m2

General offices, car parking and garages 2.5 kN/m2

DesignBy involving the UltraFloor technical team at an early stage, qualified engineers will ensure that the most effective precastconcrete solution can be achieved.

InstallationUltraFloor is delivered and fitted with a lorry mounted crane. Suitable access roads should be provided.

ProppingPropping may be required for long spans but is recommended inmost cases to remove any variation in soffit levels and should beerected before grouting takes place. The props would also provideadditional support for heavy construction loads.

SOUND RESISTANCEAcheson & Glovers UltraFloor has a high resistance to both impactand airborne sound transmission and contributes to satisfying thelatest building regulations.

Clear Span Total Allowable Ultimate BM Ultimate (m) Load (kN/m2) (kN/m) Shear (kN)

3.0 23.7 26 37

3.5 16.7 26 37

3.9 16.9 37 40

4.5 11.1 37 40

4.9 8.6 37 40

5.5 6.0 37 40

6.3 4.5 49 44

6.9 3.8 62 46

100mm Screed on UltraFloor

Timber Batten Floor on UltraFloor

When using maximum span consideration must be given to the effects of deflection, vibration.FIGURES FOR GUIDANCE ONLY PLEASE CONSULT OUR TECHNICAL TEAM FOR FULL DETAILS.

SAFE UNIFORM LOADS (210mm deep UltraFloor)Typical safe uniform loads (kN/m2) for domestic purposes

(allowance has been made for self-weight of unit only)

ACHESON & GLOVER PRECAST LTDHEAD OFFICE11 Aghnagar RoadTullyvannon, Ballygawley, Co Tyrone BT70 2HWT: 028 8556 8441F: 028 8556 8447E: [email protected]

Call our sales team:

028 8556 8441 www.acheson-glover.com

Documents

Precast Flooring