Gramm Timber Absorptive Specification

1. TIMBER ABSORPTIVE NOISE BARRIER - ACOUSTIC FENCING Acoustic Barriers Gramm Barrier Systems Registered in England and Wales No: 05836133

2. Full Design, Supply and Installation of Your Noise Barriers Industry Leading Sound & Environmental Barriers Our Noise Barriers and Sound Fencing come in a full range of materials, allowing us to supply and install exactly the right product for you project. This includes reflective & absorptive sound barriers manufactured from: The key to a successful project using noise barriers, acoustic fencing, acoustic barriers or sound barriers is getting the right design in place at the very beginning. Our expert engineers will: - Assess your needs to ensure we fully meet both your current and future requirements. Timber, Acrylic, Aluminium, Plastic (acrylic, polycarbonate and recycled) and Concrete noise barrier panels. - Recommend the correct type of reflective and absorptive noise barriers for your project. We also offer an additional product to enhance even further the noise reducing characteristics of acoustic screens. Timber Absorptive Noise Barrier - Acoustic Fencing - Take into account ALL your needs. This includes not only how effectively your chosen noise barriers and acoustic fencing absorb and reflect sound, but whether they also look right for each particular location, and how easy they are to maintain. Tried, Tested, Trusted Having taken the time to make sure you have the best possible acoustic barriers for your project, we will supply and install them on time, and on budget. We have a reputation for providing the very best products and service on every project we undertake. We offer a full service, from the initial concept of any noise & environmental barrier project right through to commissioning and completion. We will advise and guide you on the right acoustic barrier product for your environment and produce designs and drawings showing how the barriers will be placed to be most effective. We will then manage every aspect of the sound barrier supply and installation, working closely with any other contractors involved in the project to ensure we meet all the agreed deadlines to have the noise barriers in place and working just the way you require. Gramm Barriers systems have uniquely designed there Acoustic Fencing systems to offer the highest levels of sound reduction on the market! We have also designed our Noise Barriers to have a life span of 30 Years! We have put a lot of thought into our noise barrier range and have designed all our systems to be maintenance free for the full life span of the barrier. Our Timber Absorptive Noise Barriers can be installed in any location with either concrete in or base plated posts. This commitment to providing only the highest levels of service means you can rely on Gramm Barriers, whatever your sound barrier & environmental barrier needs. Call now to find out just how we can work with you and provide the best acoustic barrier installation service you could wish for. All our installers have worked with us for over 15 Years and work to the high levels quality and professionalism we demand. Technical specification: This system has been laboratory tested achieving a Sound Reduction Rating of 35dB (A) & a density of 37.5kg/m2. All timber materials sourced from a FSC, QA Sector Scheme 4a approved supplier.

3. Gramm sawn softwood Acoustic Absorptive Comprising specialized C24 stress graded structural posts or Steel RSJ Noise barrier posts dependant on height with specially manufactured galvanised steel rail cleats. Foundation and post size dependant on height and location. ST5 concrete to be used for post foundations. Timber Species: Douglas Fir & Larch – pressure treated Tanalith E preservative (Green) Ex works. All in accordance with the Specification for Highway Works Technical Memorandum HA66/95, BS EN1793: parts 1-5 and BSEN1794: parts 1 & 2. Barrier: * Note: Post lengths/sections, foundation sizes and post spacings may vary subject to final site survey, design calculations and safety requirements. Gramm timber noise barrier panels to be constructed on site. Panels to comprise horizontal rails, at 675mm maximum centres and 1 no gravel board, Clad reverse face side only with Gramm barriers environmental Vertical main boards. infilled with 75mm thick x 100kg/m3 density mineral wool protected with geotextile fabric and Clad face (noise source) side with vertical battens, with chamfered front edges, at 80mm canters. All surmounted by twice weathered capping, securely fixed to top rail with stainless steel annular ringshank nails. This system has been laboratory tested achieving a Sound Reduction Rating of 35dB (A) & a density of 37.5kg/m2. All timber materials sourced from a FSC, QA Sector Scheme 4a approved supplier. The above specification is the property of Gramm Barrier Systems Ltd. Please note: Structural calculations may be required by qualified persons, no responsibility can be accepted by using this design without professional advice. 5 1 Design and height to suit specific requirements. 2 Conforms and tested to BS EN 1793. Also tested and complies to BS EN 1794-1 and BS EN 1794-2. 6 Design in accordance with specification for highway works clause 2504. Treatment to sector scheme 4. 3 Complies with highways sector scheme 2C for the prefabrication of environmental barriers. Structural calculations may be required by qualified persons, no responsibility can be accepted by using this design without professional advice. 7 Height of sound screen variable to suit specific locations. Post centers at 3.0M unless otherwise specified. 4 Absorbent sound screens can also be fitted to timber posts as an alternative. page 1

4. Absorbent Sound Screen BS EN 1793 - 1: 1998 Absorbent Sound Screen BS EN 1793 - 2: 1998 Size: 12m2 Size: 8.64m2 Receiving ROOM Receiving ROOM Volume: Condition: Type: Location: 220m2 Clean Large Reverberation room Acoustic transmission suite Volume: Condition: Type: Location: 136m2 Clean Small Reverberation room Acoustic transmission suite Sample Out: Sample In: DI: TEMPERTURE TEMPERTURE 12 20.1 C 22.4 C HUMIDITY HUMIDITY Category: 48.50% 51.70% A4 TEMPERTURE HUMIDITY DLR 19.2 C 56.30% 35 Category: B3 FREQUENCY HZ FREQUENCY HZ 60.00 aS aS 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 0.27 0.40 0.62 0.90 0.94 1.03 1.10 1.06 0.97 0.99 1.00 0.90 0.89 0.92 0.90 0.87 0.92 0.91 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 0.27 0.40 0.62 0.90 0.94 1.03 1.10 1.06 0.97 0.99 1.00 0.90 0.89 0.92 0.90 0.87 0.92 0.91 40.00 Sound Reduction Index R(dB) 30.00 20.00 10.00 Test Results for Gramm Barrier Systems Ltd. Issued by University of Salford (Acoustic Test Laboratory) UKAS accredited test laboratory No. 1262 Test Results for Gramm Barrier Systems Ltd. Issued by University of Salford (Acoustic Test Laboratory) UKAS accredited test laboratory No. 1262

5. Technical specification: This system has been laboratory tested achieving a Sound Reduction Rating of 35dB (A) & a density of 37.5kg/m2. All timber materials sourced from a FSC, QA Sector Scheme 4a approved supplier.

6. Lateral Timber Movement The design of the panels should avoid gaps occurring under operational conditions, such as shrinkage and warping. Natural timber movement is not prevented since boards are free to expand and contract naturally and therefore splitting and gaps do not occur. Special ring shank nails (in stainless steel) prevent removal of cover strips and boards by vandalism. Standard detail drawing: “If timber is used for panels, the minimum design thickness should be based on the seasoned dry weight of the timber. A gravel board of durable material will be needed if the panels are made of material likely to deteriorate when in contact wit the ground.” Technical specification: This system has been laboratory tested achieving a Sound Reduction Rating of 35dB (A) & a density of 37.5kg/m2. All timber materials sourced from a FSC, QA Sector Scheme 4a approved supplier. The above specification is the property of Gramm Barrier Systems Ltd.

7. Contact - Tel: 01323 872243 Fax: 01323 872244 National: 08442 259002 Email: info@grammbarriers.com Gramm Barrier Systems Ltd Head Office 18 Clinton Place, Seaford, East Sussex, BN25 1NP