對于(yu)變(bian)形量較(jiao)大（40～60 mm以上）的(de)(de)情(qing)況，可采用(yong)(yong)以鋼(gang)板(ban)(ban)為(wei)跨(kua)縫(feng)材料(liao)的(de)(de)伸縮(suo)裝(zhuang)置，以鋼(gang)板(ban)(ban)為(wei)跨(kua)縫(feng)材料(liao)，一(yi)般用(yong)(yong)于(yu)中、大型橋(qiao)梁，它在斷縫(feng)處用(yong)(yong)預埋鋼(gang)筋(jin)和預埋鋼(gang)板(ban)(ban)固(gu)定(ding)梁兩(liang)端護緣鋼(gang)板(ban)(ban)，再(zai)將護緣鋼(gang)板(ban)(ban)用(yong)(yong)高強螺栓與梳齒形鋼(gang)板(ban)(ban)連接，這(zhe)樣(yang)梳齒鋼(gang)板(ban)(ban)固(gu)定(ding)在斷縫(feng)兩(liang)側，通過梳齒的(de)(de)縫(feng)隙實(shi)現斷縫(feng)處的(de)(de)位(wei)移和變(bian)形。