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Cable railings, or wire rope railings, are safety rails that use horizontal or vertical cables in place of spindles, glass and mesh for infill. Cable railing on residential deck overlooking a lake Uses
The typical deck railing is generally built from pressure treated lumber. [14] Posts on a deck are also typically pressure treated wood and standard sizes are 4x4, 6x6, and 8x8. These posts give structural support to the railing assembly and are the most critical part for the safety of the guard rail assembly. [ 15 ]
A pilot ladder has specific regulations on step size, spacing and the use of spreaders. It is the use of spreaders (long treads that extend well past the vertical ropes) in a pilot ladder that distinguishes it from a Jacob's ladder. When not being used, the ladder is stowed away, usually rolled up, rather than left hanging.
Guardrails in the US are generally required by code where there is a drop of 30 inches (0.76 m) or more. Examples of this are both architectural and environmental. Environmental guard rails are placed along hiking trails where adjacent terrain is steep. Railings may also be located at scenic overlooks.
Occupational Safety and Health Administration (OSHA) guidelines describe the requirements for grab bar clearance, diameter and spacing on fixed ladders. [4] These regulations state that the clearance in the back of grab bars must be at least 4 inches, the diameter similar to the ladder rungs and, when horizontal, grab bars must be spaced by a ...
This book covers the functional design of roads and highways including such things as the layout of intersections, horizontal curves, and vertical curves. Standard Specifications for Transportation Materials and Methods of Sampling and Testing. AASHTO LRFD Bridge Design Specifications. This manual is the base bridge design manual that all DOTs ...