Structural use of timber. Recommendations for the calculation basis for span tables - Purlins supporting sheeting or decking Ingestion-build-183511 together with emergency lighting of

together with emergency lighting of sufficient intensity in case of failure of the normal lighting

and symbols defined in ISO/IEC 646

For purposes other than protective or decorative

Choice of anchorage location

Structural use of timber. Recommendations for the calculation basis for span tables - Purlins supporting sheeting or decking Ingestion-build-183511 together with emergency lighting ofBS 5268 7. 7: 1990 recommends a calculation basis for the permissible clear span of purlins supporting sheeting or decking in pitched roof construction. The recommendations apply to purlins formed from solid timber and supported by external or internal walls. The major axis of the purlin is perpendicular to the roof slope; other orientations of the purlin are not covered by this standard. The uniform and concentrated loads of BS 6399 1 are considered.