Technical information Crab range

98 P u b l i c s t a i r c a s e Public staircase design chart Load rating - Compliant with standard NF P 93-523 (temporary metal staircases for public use) - Structure anchored vertically every 4.00 m - Admissible load of uprights: lf = lo = 2.50 m i.e. for a Multicrab standard = 16.24 kN for a Crabétai standard = 26.65 kN Maximum height of the structure H L L L Width (L) Multicrab standard Crabétai standard 1.00 m 16 m 22 m 1.50 m 11 m 15 m 2.00 m 7 m 10 m L 1.50 m 1.50 m 110 100 16,7 110 100 29,9 150 34° 25 Comparison with the current standard Unit: cm NF P 93-523 Public staircase Flight slope 30° to 38° 34° Rise 13 cm < h < 17 cm 16.7 cm Tread - 29.9 cm Overlap Not specified 4.9 cm Step width 0.9 m ≤ width < 2.04 m (4 UP) 1.00 m - 1.50 m - 2.00 m Going 25 cm ≤ g ≤ 36 cm 25 cm Step size 57 cm ≤ 2h + g ≤ 66 cm 58.4 cm Non slip, self draining treads yes Headroom > 2.25 m min. 2.50 m Landing depth ≤ 1.00 m ≤ 1.00 m min. Height of handrail from the step's nose 1.00 m < h < 1.30 m 1.00 m < h < 1.10 m Rampant guardrails Compliant with standard NF P 01-012 Horizontal guardrails Compliant with standard NF P 01-012 Working load 6 kN/m 2 The dimensions of the anchor ties depend on: - The geographical area where the structure is located, - The cladding on the structure (no cladding or covered with nets or canvass sheets), - The nature of the bearing element. (see: manufacturer’s specifications for eyebolts) The specified maximum are given for independent staircases. If they adjoin or are integrated into a Multicrab framework, a specific design note must be produced. Our design offices are at your disposal for any further information you may require. 01.11.17 T e c h n i c a l i n f o r m a t i o n