Safesite flatroof systems and cantilevered guardrails

Safesite flatroof systems and cantilevered guardrails

Safesite and Ridgeway are committed to providing solutions to fall arrest situations that arise on a daily basis throughout industry and commerce. Service, reliability and cost competitiveness are the key principals to our continual success within the fall arrest market.

Since the introduction of legislation to reduce personal injury by protecting access to flat roofs we have been active in erecting Cantilivered guardrail systems and lifeline fall arrest systems to various sites such as hospitals, banks, universities, shopping centres, civil buildings and industrial plants across Ireland.

General

System 2000 is a fully cantilevered guardrail without any requirement for physical fixing into the roof’s structure/membrane. The complete system’s design, manufacture, testing and installation has been externally assessed by the British Board of Agrément and issued with a BBA Certificate No. 95/3182.

Materials

System 2000 is fabricated from steel to BS EN 10025 S275 Grade : 1993 and S275JO Grade. All steel components are then hot dipped galvanised to BS EN ISO 1461. Guardrail upper and lower rails are produced in steel -48.3mm external diameter. All fixing screws are A2 Grade Stainless Steel and are greased before installation. All cast clamps used to join the guardrail are galvanised malleable cast iron produced to BS EN 1562 : 1997 founding malleable cast iron. All components in contact with the roof membrane are covered with 3mm fluted rubber. Counter weights are totally fabricated in steel. Where tubing is cut on site zinc rich paint is applied to the cut end of the tube.

Layout

Height of guardrail is set at 1100mm. All vertical supports are set at no more than 2M centres with counter weights set at no more than 4M centres on a straight run. All stop ends are double counter weighted or supported by way of a wall/ladder clamp.

Test Criteria

System 2000 was tested to the Health & Safety Executives Specialist Inspectors Report No 15 by the British Standards Institute (BSI) and the National Engineering Laboratory (NEL). 1. All testing was carried out on a roof pitch of 10° as the Building Regulations stipulate a flat roof can be 0º-10° in pitch. 2. All guardrail testing was carried out on a 6M straight run of guardrail without end returns. 3. A 0.7kN load was applied to the top rail at the very end of the 6M straight run with out moving more than 100mm at the base. 4. Ditto above with a 0.3kN load applied to the top rail between vertical supports in the first bay from one end. Tube deflection not to exceed 35mm.

Wind Loading

System 2000 was assessed by the British Board of Agrément to ensure compliance with BS 6399 : Part 2 : 1997 Code of Practice for Wind Loads. This is fully documented and approved by the British Board of Agreement.

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