This Standard sets out safety requirements for the design and construction of portable reinforced plastic ladders. The Standard provides for ladders of two duty ratings, industrial ladders and domestic ladders, which are assigned minimum load ratings.The Standard covers single and multiple-section ladders, multipurpose ladders, stepladders and combination ladders.The Standard does not cover ladder accessories, including ladder levellers, ladder stabilizers or stand-off devices, ladder jacks, or ladder straps or hooks, that may be installed on, or used in conjunction with, ladders.