yesterday the scaffolding at a seven-stored building under construction in soi pipat off sukumwit road collapsed, killing one worker and injuring two others, one of whom is in serious condition. a worker who asked that his name be withheld said that the scaffolding had been so weak that it could take the weight of only two workers. the company manager who is the contractor will be summoned for investigation after the work of clearing the debris is finished,police said