217 ACCESS STAIRCASES- TECHNICAL INFORMATION - 2023 STAIRCASES PUBLIC STAIRCASE DESIGN CHART Design assumptions •Compliant with standard NF P93 - 523 (temporary metal staircases for public use) •Structure anchored vertically every 4.00 m •Admissible load of uprights: lf = lo = 2.00 m i.e. for a MULTICRAB upright = 1,731 daN for a CRABÉTAI upright = 2,748 daN Maximum height of the structure (en m) with MULTICRAB or CRABÉTAI upright Width (L) Standard MULTICRAB CRABÉTAI 1.00 m 16 m 22 m 1.50 m 11 m 15 m 2.00 m 7 m 10 m Our design offices are at your disposal for any further information you may require. The dimensions of the anchor points depend on: •The geographical area where the structure is located, •The cladding on the structure (no cladding or equipped with nets or canvas cover). •The nature of the support. (see: manufacturer’s technical information for fasteners) The maximum heights are given for independent accesses. If they adjoin or are integrated into a MULTICRAB framework, a specific design note must be produced. Comparison NF P93- 523 Public staircase Public staircase with CRABESCAL Angle of flight 30° to 38° 34° Rise 130 ≤ h ≤ 170 mm 167 mm Tread - 299 mm Overlap Not specified 49 mm Step width 0.90 ≤ width. < 2.04 m (4 U.P.) 1.00 m / 1.50 m / 2.00 m Step run 250 ≤ g ≤ 360 mm 250 mm Step size (Blondel) 570 ≤ 2h + g ≤ 660 mm 584 mm Non slip, self draining steps yes yes Headroom > 2.25 m 2.50 m minimum Landing depth ≤ 1.00 m ≤ 1.00 m minimum Height of handrail from the nosing 1.00 ≤ h < 1.30 m 1.00 ≤ h < 1.10 m Rampant guardrails Compliant with standard NF P 01- 012 (guardrail and stair handrail) Horizontal guardrails Compliant with standard NF P 01-012 Working load 600 daN/m²
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