According to IS 800, the lacing system of a built-up column shall be designed to resist a total transverse shear force equal to what percentage of the total axial force in the member?

The strength and size specification of a butt weld is primary specified by its:

As per IS 800, the maximum bending moment for the design of purlins can be taken as (where W is the total distributed load including wind load on purlins and L is the effective span/centre distance of supports):