The block is still just a skeleton of girders.這片建筑還只是僅有主梁的骨架.All girders shipped by rail were arranged on a flatbed rail car.由火車裝運(yùn)的所有主梁都安放在平板火車車皮上.The girders are carried on trestles.這些大梁是由支架撐著....
During fabrication slots for the stringers flanges were flame cut into box girders.制造時(shí),為安裝縱梁翼緣,在箱型梁中用焰割法開(kāi)槽口.The web and flanges of the main girders were fabricated from ASTM A 441 steel.主梁的腹板和翼緣用ASTMA441鋼制造.The block is ...