FIELD STUDY OF FABRICATION TIME FOR WEB-CLAMPED BEAM-TO-COLUMN CONNECTION

Welded beam-to-column connections have been widely used in Japan, however, one of the disadvantage compared to bolted connections is the difficulty and low production speed. Bolted connection may be an alternative way to higher production speed, however, very few quantitative and actual data have been reported. This paper reports the fabrication time for web-clamp type connections as one of the bolted connections. From the work record for an actual steel building construction using the Web-clamped type connections, the work time of each production step was aggregated and compared to that of conventional welded connections. As a result, it was shown that the fabrication time for Web-clamped connections is 30 % less than the estimated fabrication time for conventional welded connection, thanks to the smaller number of parts and the less quantity of welding.