... big ,weight is light ,which causes structure weight reduce 30%~40%.Welded H beam is much lighter and thus save ... appearance, wide range of application. After using H beams,30%-50%construction time can be decreased and 5% usage area ... of the room can be increased, 10%-30% of steel can be saved and 20% of the ... .00396*199*7*1156.70400*200*8*1366.00400*150*8*1355.80400*400*13*21172.00400*408*21* ...