Technical information Crab range

7 4 H é l i c r a b s p i r a l s t a i r c a s e 700 mini (landing) 700 (landing) 710 (tread) h = 200 33,7° g = 165 150 464 390 Tread line Conformity EN 12811-1 NF P 93-521 Helicrab Flight slope 30° to 55° 30° to 45° 33.7° Rise ≥ 175 mm, ≤ 225 mm Not specified 200 mm Tread ≥ 165 mm ≥ 125 mm 185 mm Overlap - 25 ≤ a ≤ 55 mm Not specified 40 mm Step width ≥ 500 mm 550 ≤ width < 750 mm 710 mm Going 150 ≤ g < 175 mm Not specified 165 mm Step size 2 x rise + going ≥ 540 mm, ≤ 660 mm 565 mm Non slip, self draining tread yes yes yes Headroom Free height ≥ 1.90 m > 2.25 m 3.00 m Landing depth Not specified ≥ 600 mm 700 mm Stair toe-rail No At least as high as the nosing Working load 1 kN/m² 2 kN/m² 2 kN/m² Handrail above floor > 950 mm > 950 mm 1365 mm Maximum gap between guardrails < 470 mm < 470 mm 464 mm Landing toeboard ≥ 150 mm ≥ 150 mm 150 mm Standalone tower Bill of materials for a 4.00 m standard staircase Crab system components Hélicrab components Load rating - Load capacity to NF P 93-521 (Worksite access towers with ladders, steps or staircases) - The first anchors should be a 2 m above the ground then every 4 m. As the Hélicrab fits into a Multicrab framework, make sure you comply with operating conditions and the characteristics of the equipment, in particular: - anchors every 4 m, - bracing, - the admissible loads of the parts: ledgers, diagonals, standards according to their buckling length. As Hélicrab is very flexible, you may contact the design office for further information or particular designs that you may require. 1.50 Anchoring both sides 1.50 4.00 A landing should be included every 25 steps for resting 4.00 m self-supporting tower on its own for winds not exceeding 65 km/h. A 0.20 m x 1.50 m Panacier, a 0.30 m x 1.50 m Panacier and a 1.17 m diagonal are required for erection. Code Description Weight Quantity 195549-1 Adjustable base plate with fixed plate 3.60 4 270010-2 Crabétai baseplate 2.14 1 240000-0 Galv basic standard 2.53 4 250101-3 Galv 1.00 m standard 5.32 1 250102-1 Galv 2.00 m standard 9.59 4 250103-9 Galv 3.00 m standard 12.66 4 250001-5 Single coupling for Crab Stairs 1.45 1 300009-8 S pin 0.08 9 250207-8 0.70 Ledger 2.53 1 250215-1 1.50 Ledger 4.63 12 252215-9 Reinforced ledger 1.50 m 8.90 2 252015-3 Diag. H 2.00 x L 1.50 L = 2.45 6.28 3 251015-4 Diag. H 1.00 x L 1.50 L = 1.72 4.35 10 256070-4 Guardrail 0.70 m MDS Multicrab 5.95 1 115021-8 0.20 m x 1.50 m Panacier 9.23 1 107031-7 0.30 m x 0.70 m Panacier 6.64 2 115031-7 0.30 m x 1.50 m Panacier 10.24 4 257070-3 0.70 m Crab steel toeboard 1.04 1 257150-3 1.50 m Crab steel toeboard 2.28 1 N-C 200 x 200 x 20 block - 1 000001-8 Storage handling rack 50.00 1 Code Description Weight Quantity 250042-9 Two step flight 11.60 4 250043-7 Three step flight 15.80 4 250040-3 Guardrail standard 4.90 1 250045-2 1.50 m Hélicrab MDS guard rail 9.66 7 250047-8 Erection trapdoor 15.30 1 000011-7 Hélicrab cradle 48.00 2 Crab standard system component weight = 334 kg Hélicrab specific component weight= 197 kg Cradle weight = 146 kg Total weight = 677 kg Specifications and load capacity 01.11.17 T e c h n i c a l i n f o r m a t i o n