BS 1139-4 is the fourth part of the multiple series that is applicable to metal scaffolding.
BS 1139-4 specifies requirements for the design and fabrication of steel split heads and steel trestles for use as supports for temporary platforms.
BS 1139-4 on prefabricated steel splitheads and trestles is useful for
A trestle is a self-supporting metal stand incorporating one or more beams on which a working platform may be laid.
BS 1139-4 specifies splitheads and trestles requirements of fabrication and workmanship, dimensions, stability, and vertical load-carrying capacity that is durable enough to survive fair handling in typical use, storage, and transit without substantial damage. BS 1139-4 helps you to design, construct, and testing of equipment for use in scaffolding, and other temporary structures.