Independent reinforcement-mass check

A BBS contains 50 m total length of 20 mm diameter reinforcement. Using steel density $7,850\text{ kg/m}^3$, estimate the mass.

Why a revised beam requires a new BBS/BOQ

A beam is widened after a coordination change. The STAAD model is updated and the analysis forces change slightly. Can the previous reinforcement schedule remain in the BOQ if its old required steel area still appears adequate?