RPC Contracts is committed to innovative product development and manufacture. T o help you obtain maximum enjoyment and long service from any RPC

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1 RPC Contracts is committed to innovative product development and manufacture. T o help you obtain maximum enjoyment and long service from any RPC Contracts product, we would be pleased to make you aware of the following: the evolution of new product design is continuous and information is subject to change without notice. Customers should check with the supplier to ensure they have the latest details. All our products are manufactured to the appropriate British Standard where applicable. Where products (or intended usage) lie outside the scope of a British (or draft European) Standard, RPC Contracts own standard will be employed. All products are supplied subject to RPC Contracts Conditions of Sale, as detailed on the reverse of your quotation. Liability in respect of any statements, conditions, warranties and representations made on behalf of the Company is limited in accordance with the terms set out in the Conditions of Sale. 2015

2 Ankalok Ankalok fully interlocking precast concrete revetment embodies a unique double anchor head shape which ensures that each block in a revetment is positively interlocked with the six surrounding units. Tapered sides provide for the articulation of the interlocked units to a minimum 0.5m radius. Following installation when the cells and joints between blocks have been filled with gravel/soil additional frictional interlock is achieved which helps to provide considerable resistance to vertical displacement. Design The unique design of Ankalok provides units of exceptionally high handling and in service strength with the soil/gravel retaining cells being formed by the configuration created when the blocks are laid and interlocked together. The size and spacing of the cells have been designed to afford maximum protection from erosion whilst permitting the release of excess pore water pressure. Above normal water level the block cells may be soil filled and seeded thus further aiding stability by root establishment. Below water level the cells can be filled with a graded gravel to add extra weight to the armour layer and additional resistance to vertical displacement. Ease of Construction The simple one unit system enhances a straight forward laying procedure which allows rapid installation without the need for highly skilled labour. Ankalok is particularly appropriate for sites with difficult access where larger systems such as pre-assembled panels needing heavy handling equipment cannot be used. The Most Common Uses Coastal embankments Inland waterways Dams Reservoir channels River embankments Marinas Access ramps and slipways General landscaping and bridge slope paving Flood Defence Please ask for our Technical Specifications. Full Installation services are also available from RPC Contracts Ltd. For further information please contact our Technical Department on

3 Ankalok the unique fully interlocking flexible system which protects and enhances the natural environment Design Specifications The following information is intended to give guidance in the preliminary selection of the systems. RPC Contracts provides design advice and detailed site specific drawings on all contracts where the Company s revetment systems are to be used. In addition, contractors will be provided with full working schedules and on-site advice. Primary Armour Where a flexible concrete revetment is required the actual design will depend upon the application, the nature of the formation and environmental considerations. The areas to be protected should be graded to the correct line and level, and be free from obstructions. An adequate toe support will be necessary and advice on selection of suitable details should be sought on a site specific basis. The Ankalok interlocking units are hand laid directly onto a geotextile membrane. Ankalok Underlayer The design and specification of the underlayers is of fundamental importance to the stability of the structure as a whole. The need for the geotextile and natural filter layers will be determined on a site specific basis. For example, in situations where the passage of ground water is likely to cause leaching of fine particles of bank material, use of a suitable geotextile filter laid directly beneath the revetment is recommended. Benefits Provides fully interlocking yet flexible protection from erosion Allows vegetation to grow through Blends with and enhances the natural environment Cost effective Ankalok Readycon The Company s policy is one of continuous development and product improvement. Information contained in this brochure is subject to alteration without notice.

4 Installation The areas to be protected should be graded to the required line and level and free from obstructions. Where a geotextile filter has been specified this should be laid onto prepared subgrade with overlaps of not less than 300mm. Following the provision of suitable toe support, the Ankalok blocks are then laid in courses to a straight line working away from the toe beam. The first two courses should be laid simultaneously to ensure that the correct spacing and interlock is achieved. It should be noted that the blocks are not intended to butt tight at the ends but to have an open joint of approximately 10mm. Following installation of the first two courses it is advisable to set string lines perpendicular to the toe at approximately 6m centres thus maintaining a constant course length and ensuring that the revetment remains square and uniform. Filling and Seeding On completion of installation the open cells and joints of the revetment should be filled with the material relative to the nature of the aplication. Below normal water level this may take the form of angular gravel, suggested grading of which is 10-15mm. Above water level the cells may be filled with selected top soil and sown with a seed mixture suitable to the location. (Ref. CIRIA R116). Additional Anchoring Additional anchorage of revetment may be provided by the installation of 40mm square timber or 25mm diameter mild steel pegs driven through selected block cells. Where it is difficult to provide a satisfactory toe support at the base of the revetment additional restraint can be provided along the top of the revetment by installing timber or steel pegs at one per block i.e. 0.4m centres. For technical advice & quotations contact: RPC Contracts Quarryfields Ruthin Denbighshire LL15 2UG Fax: contracts@rpcltd.co.uk RPC Contracts continues to demonstrate a vast amount of expertise in production methods as well as immense understanding of the construction techniques in which the products will be used. Investment in modern production facilities and adherence to strict quality control procedures ensure that all RPC Contracts products are capable of providing the consistency in performance and quality demanded by the building and construction industries of today.

5 Other Products RPC Contracts offer bespoke concrete services ranging from precast concrete sea defences and wave walls to stepped concrete revetments, which combine erosion control with increased amenity areas. SPECIALIST CIVIL ENGINEERING CONTRACTOR One of the UK s leading civil, geotechnical and environmental engineering contractors, committed to excellence and customer satisfaction in all aspects of its operations. Armorflex Armorflex is a flexible, interlocking matrix of concrete blocks of uniform size and weight connected by a series of cables which pass longtitudinally through preformed ducts in each unit. Dycel Dycel is a fully interlocking precast concrete revetment system designed to provide protection against embankment erosion above and below water level whilst ensuring the flexibility to cope with variations in embankment profile. Armorloc Dytap Armorloc concrete interlocking blocks are specifically designed to control erosion and provide easy, economical installation when heavy equipment is not feasible or cannot be used due to confined or hard to reach areas. Dytap Dytap is a system of precisely interlocking precast concrete units which provide protective surface with visual appearance of natural random stone with the installation benefits of precast concrete. RPC Contracts provides specialist engineering and construction services across a wide range of sectors including commercial, industrial, house building, infrastructure, marine, highway and environmental. Retaining walls Slope reinforcement Environmental engineering Erosion control Bespoke problem solving Acoustic barriers Marine defence systems OUR COMMITMENTS RPC Contracts is committed to protecting the wellbeing of its staff and of those with whom they interact. The company adheres to strict Health and Safety, Environmental and Quality Assurance Policies as well as to the ongoing training of its staff. Details of company policy statements are available on request. DEDICATION TO EXCELLENCE The company maintains a highly qualified and experienced workforce that shares a commitment to satisfaction. As an owner managed private company, RPC Contracts is able to provide a highly focused, solution-driven approach to business. This together with a positive, can-do attiitude and personal attention to client needs, makes RPC Contracts unique in civil engineering contracting. Dycel Cellular

6 RPC Contracts, Quarryfields, Ruthin, Denbighshire, LL15 2UG, UK T el: Fax: contracts@rpcltd.co.uk