Boston, July 5 (AP)—Fire Chief Daniel F. Sennot placed the blame for the collapse of the Pickwick Club building here yesterday on the management of the club.

“The building was allowed to become overcrowded,” he declared, “and the tremendous weight, combined with the rythmic tread of the dancers was too much for the walls and floors. The fire of a few months ago had nothing to do with the collapse, as the damage from that was confined entirely to the floors above the club.”