對于變(bian)形量較大（40～60 mm以上）的(de)情況，可(ke)采用(yong)(yong)(yong)以鋼(gang)板(ban)(ban)為(wei)跨縫(feng)材(cai)料的(de)伸縮裝(zhuang)置，以鋼(gang)板(ban)(ban)為(wei)跨縫(feng)材(cai)料，一般用(yong)(yong)(yong)于中、大型橋(qiao)梁，它在(zai)(zai)斷(duan)(duan)(duan)縫(feng)處(chu)(chu)用(yong)(yong)(yong)預(yu)(yu)埋(mai)(mai)鋼(gang)筋和(he)預(yu)(yu)埋(mai)(mai)鋼(gang)板(ban)(ban)固(gu)定梁兩(liang)端護緣鋼(gang)板(ban)(ban)，再(zai)將護緣鋼(gang)板(ban)(ban)用(yong)(yong)(yong)高(gao)強螺栓與梳齒形鋼(gang)板(ban)(ban)連接，這樣梳齒鋼(gang)板(ban)(ban)固(gu)定在(zai)(zai)斷(duan)(duan)(duan)縫(feng)兩(liang)側，通過梳齒的(de)縫(feng)隙實現斷(duan)(duan)(duan)縫(feng)處(chu)(chu)的(de)位移和(he)變(bian)形。