對于(yu)變形(xing)量較大（40～60 mm以上）的情況，可采用(yong)以鋼板(ban)(ban)為跨(kua)縫(feng)(feng)材料的伸縮(suo)裝置，以鋼板(ban)(ban)為跨(kua)縫(feng)(feng)材料，一般用(yong)于(yu)中、大型(xing)橋梁，它在斷縫(feng)(feng)處用(yong)預埋(mai)鋼筋(jin)和預埋(mai)鋼板(ban)(ban)固定梁兩(liang)端(duan)護(hu)(hu)緣鋼板(ban)(ban)，再將護(hu)(hu)緣鋼板(ban)(ban)用(yong)高強(qiang)螺栓(shuan)與梳(shu)齒(chi)(chi)形(xing)鋼板(ban)(ban)連接，這樣梳(shu)齒(chi)(chi)鋼板(ban)(ban)固定在斷縫(feng)(feng)兩(liang)側(ce)，通(tong)過梳(shu)齒(chi)(chi)的縫(feng)(feng)隙實(shi)現斷縫(feng)(feng)處的位移和變形(xing)。