All welded beam connection – are erection bolts needed?

We recently designed all bolted connections for some new steel inside a power plant. We did this to limit field-welding, eliminate the need for a “hot work permit”, and because we don’t have a way to check the quality of field welds. The erection Contractor has come back and stated they prefer fully welded connections; they don’t want to perform any field drilling. If I understand this correctly; OSHA 29 CFR 1926 states that the two bolts per end are still necessary to secure the beam before completing the connection:


My question is, can the Contractor get around this requirement by keeping the beam hoisted while they perform the welds on both sides (hopefully they keep the beam web vertical while it's hoisted)?