Technical information Crab range

Standard Ledger Diagonal brace Stair string Step Inner guardrail Landing Basic standard Adjustable baseplate Small guardrail Large guardrail Reinforced ledger MDS guardrail 4 s t a n d a r d s a c c e s s t o w e r, s t e e l f l i g h t s 8 4 3.00 m 1.50 m or 2.00 m Put in place adjustable tube and couplers cross bar if the deck is flexible. Compliant with standard NF P 12811-1 Load-bearing capacity compliant with standard NF P 93-521 ( access to a work station) 1.50 m 1.00 m 0.50 m Standards 4 standard access tower, steel flights NF EN 12811-1 - Class B NFP 93-521 - Staircase Flight slope 30° to 55° 45° Rise ≥ 175 mm, ≤ 225 mm Not specified 200 mm Tread ≥ 165 mm ≥ 125 mm 231 mm Overlap - 25 ≤ a ≤ 55 mm Not specified 31 mm Step width min. 500 mm 550 ≤ width < 750 mm 566 mm Going ≥ 175 mm Not specified 200 mm Step size 2 x rise + going ≥ 540 mm, ≤ 660 mm 600 mm Non slip, self draining treads yes yes Headroom Overhead clearance ≥ 1.90 m > 2.25 m 4.00 m Landing depth Not specified ≤ 0.60 m 0.61 m Horizontal guardrails Not specified Top rails, middle rail and toeboard compliant with current standard Top rail, middle rail and toeboard Working load 1 kN/m 2 2 kN/m 2 2 kN/m 2 Handrail above floor > 950 mm 1016 mm Maximum gap between guardrails < 470 mm 520 mm Landing toeboard ≥ 150 mm 150 mm 01.11.17 T e c h n i c a l i n f o r m a t i o n