Surface Installation Method Statement · Surface Installation Method Statement 308 Ifield Drive, Crawley, RH11 0EW Client: James May ... separation and filter geotextiles and a specific

Surface Installation Method Statement

308 Ifield Drive, Crawley, RH11 0EW Client: James May Job Ref: 02294R Consultant: Keiron Hart (BSc Hons,

C.Env, F.Arbor.A, MICFor, MEWI)

http://www.tamlatrees.com

1 | e: [email protected] w: tamlatrees.com o: 01252 811 233 Tamla Trees Registered England & Wales Companies Act 2006 Reg No: 08815629

Contents

1. Introduction ................................................................................................................. 2

2. No Dig System & System Components .......................................................................... 3

3. Ground Preparation & Installation ................................................................................ 4

4. Surfacing Materials ....................................................................................................... 5

5. Site Supervision Schedule ............................................................................................. 5

Appendix 1 – BS5837 Survey Key ...................................................................................... 6

Appendix 2 – BS5837 Survey Data .................................................................................... 7

Appendix 3 – Tree Works Schedule ................................................................................... 8

Appendix 4 - Tree Constraints Plan ................................................................................... 9

Appendix 5 - Tree Protection Plan................................................................................... 11

Appendix 6 – Site Photographs ....................................................................................... 14

Appendix 7 – Staking & Stapling Guidance ...................................................................... 18

Appendix 8 – Limitations ................................................................................................ 19


1. Introduction

The InfraWeb Tree Root Protection System is a combination of a 3 dimensional cellular confinement

system, separation and filter geotextiles and a specific grade of granular material. This document

should be read in conjunction with the appropriate section drawing for the specified system, to ensure

the correct installation is achieved.

Tamla Trees recommends:

Warrington Business Park Long Lane, Warrington WA2 8TX

Mobile: 07730 148581 Office: 01925 630976 Fax: 0845 3301425

Name Role Contact Details

James May Client [email protected]

TBC

Contractor TBC

Keiron Hart Tamla Trees Ltd

Arboricultural Consultant [email protected] 07845249396

TBC Crawley Borough Council

Tree Officer TBC

mailto:[email protected]

mailto:[email protected]

http://www.infragreen-solutions.com/


2. No Dig System & System Components

2.2.2 The InfraWeb is a no dig Tree Root Protection System components are listed below. Note:

some preparation of the existing area will be required prior to installation.

InfraWeb 3 Dimensional Cellular

Confinement System – 75mm

thickness proposed

Laid on Permatex 300 Separation

Geotextile

Secured with InfraWeb Staking Pins

Mesh joined by InfraWeb Stapler

and Staples

Mesh filled with 4/20mm Clean

angular stone to Bs EN 13242 and

12620

Edge supported with either

shuttered reinforced concrete

(above ground level) or concrete

kerb (above existing ground level)

Wearing course of permeable resin

bonded gravel


3. Ground Preparation & Installation

Note: The correct specification of the granular infill is vital to the long term performance of the system. Use only 4/20mm clean angular stone to BS EN 13242 and 12620

Step 1

• Remove surface vegetation by hand

• Fill any hollows in the exposed ground with sharp sand or 4/20mm clean angular stone.

• Place Permatex 300 Geotextile over the area to be protected ensuring laps are a minimum of 300mm

Step 2

• Place the collapsed panel on the geotextile and pin through 3 cells across the 2.42m orientation using InfraWeb staking pins. (See diagram in appendix 2)

• Expand the panel to its full length/ cut to required length and pin across the opposite panel end using InfraWeb staking pins.

• Pin along the length of the panel with 2 pins on each side using InfraWeb staking pins.

• Staple any adjacent panels together using the Infraweb stapler and staples. (stapling detail enclosed in appendix 1)

• The InfraWeb panels can be cut to shape if required with a heavy duty Stanley Knife

Step 3

• Fill the pockets of the InfraWeb with a 4/20mm clean angular stone.

• Allow for any settlement of the stone in the cells and top up if necessary.

• Slightly surcharge the Infraweb with 4/20mm clean angular stone if the area is to be trafficked immediately.

• Install edge supports.


4. Surfacing Materials

4.1.1. In line with comments from Crawley Borough Council a permeable resin bound surface

will be provided.

4.1.2 Resin Bound Gravel

Place Permatex 200 separation fabric over the filled InfraWeb.

Lay Asphalt carpet and resin bound gravel to the required thickness and as per

manufacturers instructions.

4.1.3 The finished installation should be left as per resin bound manufacturers guidance

prior to tracking.

Crawley Borough Council have indicated the surface should be a permeable

resin bound wearing course similar to that shown above

5. Site Supervision Schedule

Pre-commencement Inspections/ Meeting Attend site to inspect type and location of tree protection and any temporary ground protection prior to installation of surface. Tool Box talk to operatives. No further site inspections should be required.

TBC Incomplete


Appendix 1 – BS5837 Survey Key

BS 5837 Cat Description

A Those of high quality and value: in such a condition as to be able to make a substantial contribution (> 40 years)

B

Those trees of moderate quality and value: those in such a condition as to make a significant contribution (> 20 years)

C

Those trees of low quality and value: currently in an adequate condition to remain until new planting could be established (> 10 years)

U

Those in such a condition that any existing value would be lost within 10 years and which should, in the current context, be removed regardless of development (< 10 years)

Note: Sub categories are denoted in the tree survey data (A1, B1, C2 etc.). You are referred to BS5837 for further detail if required. Tree No. T (tree), G (group), H (hedge), W (woodland) + Ref No.

Species Common Name

Ht (m) Measured height in metres

DBH (m) Diameter at 1.5m above ground level

No of stems An indication of the trees form @1.5m (1 = single stem, m/s = multi-stemmed)

Branch Spread In m to cardinal points

Cr Ht Clearance (m) Overall height of lowest branches from the ground level on side of proposed development

Life Stage Young, Semi-Mature, Early-Mature, Mature, Over-Mature

General Observations Observations on the condition of the tree(s)

Tree Work Specification Proposed tree works in accordance with BS3998

BS Cat See above

Life Exp Estimated remaining contribution in years.

RPA Radius(m) Radius of the trees Root Protection Area measured from the trunk to the edge of the RPA circle in metres


Appendix 2 – BS5837 Survey Data

Tree No.

Species DBH (m)

No of Stems

Ht (m)

Crown Spread BS Cat

Age Class

Life Expect

Cr Ht

(m) Observation Recs

RPR (m)

N E S W

T1 Oak (Red) 0.94 1 14 7.1 8.3 8.2 9.1 A1 Mature 20 to

40 2

Significant highway verge/ street tree. Historic pruning wounds with some evidence

of decay establishing in places. Dislodged manhole at base of main stem. Girdling

surface roots evident.

No works 11.3

T2 Cypress

(Lawson) 0.25 1 8 2.2 2.2 2.2 2.2 C1

Early-mature

20 to 40

1

Established garden tree. Main stem divides with V

shaped Union at approximately 5.5m

No works 3

T3 Western

Red Cedar 0.36 1 12 2.8 2.8 2.8 2.8 C1 Mature

20 to 40

1.2 Established garden tree with significant growth potential.

No works 4.3


Appendix 3 – Tree Works Schedule

NOTE: All tree works to be undertaken in accordance with BS 3998:2010 ‘Tree work - Recommendations’.

Tree Surgery

Tree No. Species Proposed Tree Works BS Cat

None

Tree Removal

Tree No. Species Proposed Tree Works BS Cat

None


Appendix 4 - Tree Constraints Plan


Appendix 5 - Tree Protection Plan

Tree protection is essential to successfully integrate the proposal into the surrounding trees. It is designed to manage the impact on the underlying soil and rooting environment. It must therefore be installed prior to any further site activity. Even apparently minimal tracking of the soil near trees has the capacity to irretrievably modify the soil environment to the detriment of tree health and stability.

All tree protection must be in place prior to any site activities. It is recommended that this fencing is installed prior to any site works.

To be effective Tree Protection must remain in place for the duration of the development and form part of the site induction process. Fencing type (see images) driven by low level of development proposal.

The warning signs (provided separately to A3 size with this report) should be fixed at 6/10m m intervals to raise awareness of the fencing and its desired function.

T2 & T3 protected by the existing boundary wall.


At Start

Operatives briefed

For Duration

Fencing remains in place for duration

For Duration


For Duration


For Duration



Appendix 6 – Site Photographs

Image 1 – T1 (left) within indicative working area highlighted


Image 2 – T1 Pruning wounds Image 3 – T1 showing girdling surface roots and dislodged manhole cover


Image 4 – T1 and the existing verge Image 5 – T2 Lawson Cypress


Image 6 – A standard concrete access has been installed on the opposite

side of the road Image 7 – T3 Western Red Cedar


Appendix 7 – Staking & Stapling Guidance


Appendix 8 – Limitations

Full Legal Disclaimer This report was prepared as a report of work instructed by client (as specified). Neither Tamla Trees ltd nor any associated company, nor any of their employees, nor any of their contractors, subcontractors or their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or any third party's use or the report and its findings. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favouring by Tamla Trees ltd or any associated company. The views and opinions of authors expressed herein do not necessarily state or reflect those of Tamla Trees ltd or any associated company. Copyright & Non-Disclosure Notice The content, layout and any supporting digital files associated with this report are subject to copyright owned by Tamla Trees ltd. Exceptions to this are present where that copyright has been legally assigned to us by another party/ organisation. In addition Tamla Trees ltd may utilise content generated under license. Reproduction, scanning, copying or distribution of this report in any form is prohibited without prior written agreement Third Party Disclaimer Tamla Trees ltd, sub-contractors or suppliers will not be responsible or liable for any claim of loss or damage resulting from the third party use of the information contained within this report. Specific - Trees All tree inspections, unless specified, have been undertaken from ground level and using non-invasive techniques. Comments contained within the report on the condition and risk associated with any tree relate to the condition of the tree at the date and time of survey. Please note that the condition of trees is subject to change. This change may occur, but is not limited to biological and non-biological factors as well as mechanical/ physical changes to conditions in the proximity of the tree. Trees should be inspected at intervals relative to risk/ target areas and in accordance with relevant HSE guidance. Tamla Trees ltd can provide further information on this matter if required. Where full access to trees (Ivy, materials at base, location on 3

rd party

land) was not possible Tamla Trees ltd accept no liability for issues that arise. Please note no statutory control checks have been undertaken (unless specified). Where tree surgery works have been identified these works are based on the assumption that planning is approved, no tree works should be undertaken prior to determination of this application without up to date confirmation of the Tree Preservation Order / Conservation Area Status of the vegetation. All works should be undertaken in accordance with the appropriate Duty of Care. This should include, for example, site specific risk assessments and due diligence inspections for the presence of protected species. Any comment/ measurements relating to 3

rd party trees have been made without full access to the tree(s). Should these trees have any impact on the proposed development we would advise

you to instruct us to contact the 3rd

party and undertake further detailed inspection work. A legal Duty of Care requires that any tree works specified in this report should be performed by qualified, arboricultural contractors who have been competency tested to determine their suitability for such works in line with Health & Safety Executive Guidelines. Additionally all works should be carried out according to British Standard 3998 (2010) Recommendations for Tree Work.

http://www.hse.gov.uk/foi/internalops/sims/ag_food/010705.htm

Documents

Surface Installation Method Statement · Surface Installation Method Statement 308 Ifield Drive, Crawley, RH11 0EW Client: James May ... separation and filter geotextiles and a specific