Offshore Structure Platform Design - Offshore Structures: Design, Construction and Maintenance - page 179

F v

450
410
360
320
270
230
180

Span = 900 mm

Span = 1200 mm

Span = 1500 mm

135

75 150 230 300 380 450

Distance from closer beam “L” (m)

230 600 690 760

FIGURE 3.43 Relation between allowable loads and location of pipe support for different spans.

3.8.2 Handrails, Walkways, Stairways and Ladders
Handrails, walkways, stairways and ladders should be designed in accordance
with OSHA 3124.
Handrails should be provided around the perimeter of all open decks and on
both sides of stairways. All handrails should be 1.10 m high and made remova-
ble in panels no more than 4.5 m long. Handrail posts should be spaced 1.5 m
apart. The gap between panels should not exceed 51 mm. Handrails in the wave
zone should also be designed to withstand extreme storm maximal wave
loadings.
Walkways, stairways and landings should be designed for load combinations:

1. Dead load plus live loads.
2. Dead loads plus extreme storm 3-second wind gusts and/or extreme storm
maximum waves, whichever is applicable.

Stairways should be of structural steel, using a double runner with serrated
bar grating treads and handrails.