Hélicrab : technical manuel

• Place the screw jacks on blocks. • Fit the basic standards and the normal and reinforced ledgers. • Level and fit the 3.00 m standards. 6 0 Erection and dismantling using safe erection guard rail 4 Hélicrab: spiral worksite staircase E C H A F A U D A G E S • Fit the first anchors 2.00 m up. • Fit the 1.72 m diagonal brace on the outside . • Fit the erection platform: one 1.50 m x 0.30 m Panacier et one 1.50 m x 0.20 m Panacier. • Fit the erection trapdoor on the outside. • Fit the 2.00 m standards. • Fit the two 2.45 m diagonal braces on the outside . • Fit the safe erection guardrail and ledgers. • Fit the bottom full floor: four 0.30 m Panacier and one 0.20 m Panacier in the middle. • Fit three 1.72 m diagonal braces on the outside and a 2.45 m diagonal brace on the outside . • Fit the safe erection guardrails in the outside stirrups. • Fit the ledgers into the stirrups at the bottom of the safe erection guardrails. The safe erection guard rails are now locked in place. • Fit four 1.72 m diagonal braces on the outside . • Fit the stair support ledger 1.00 m above the erection platform. • Fit the flights of steps alternating two step flights and three step flights. • Fit the anchors (every 4 m). • Repeat steps 5 to 8 as required. • Bolt a sliding foot for Crab stair to a 1.00 m standard. • Attach a 1.17 m erection brace to the upper stirrup of the 1.00 m standard. • Place the sliding foot for Crab stair on the exit ledger and turn. • Lock the erection brace to fix the standard. 1 2 3 4 5 6 7 8 9 • Attach the “No entry” sign. • Fit the stair support ledger 1.00 m up. • Fit the 1.72 m diagonal brace on the outside. • Place the Crabétai baseplate on a 200 x 200 x 20 mm block. • Fit the first four flights of steps alternating two step flights and three step flights. Stair tower supported on a Panacier for heights < 24 m