Portable roof ladders. Specification1 Scope This British Standard specifies requirements for portable roof ladders specifically designed solely to provide temporary access to pitched roofs with angles between 25 and 65 for tasks that are of short duration and low risk. In particular, it specifies: a) general design features, requirements and test methods; b) the supporting elements, the bearers and ridge hook, and their connections to the ladders, including how a ladder is supported and

PD CLC/TR 62453‑51‑20 on communication implementation for common object model for field device tool (FDT) interface specification is applicable to:

After lamination according to the supplier’s instructions

the VSM method of measurement

temperature –20 °C to +60 °C

continuously hot-dip coated flat products of low-carbon steel strip and sheet for cold forming

it identifies conditions and values that present a risk of reading problems and provides recommendations to users on the specification of substrates and the set-up of scanning systems to minimize these problems

This helps in designing and constructing these connectors

its wider use is not precluded

- General purpose cables (BB and BN4 types)

such as optical CTs and Rogowski coils

1) x ⩾ L (i

To allow the most efficient use to be made of bandwidth and processing capacity