對于變形量較(jiao)大（40～60 mm以(yi)(yi)上(shang)）的(de)情況，可采用(yong)以(yi)(yi)鋼(gang)板(ban)(ban)(ban)為跨縫(feng)(feng)材(cai)料(liao)的(de)伸縮裝(zhuang)置，以(yi)(yi)鋼(gang)板(ban)(ban)(ban)為跨縫(feng)(feng)材(cai)料(liao)，一般用(yong)于中、大型橋梁，它(ta)在斷(duan)縫(feng)(feng)處用(yong)預埋鋼(gang)筋和預埋鋼(gang)板(ban)(ban)(ban)固定(ding)梁兩端護(hu)緣鋼(gang)板(ban)(ban)(ban)，再將護(hu)緣鋼(gang)板(ban)(ban)(ban)用(yong)高強螺(luo)栓(shuan)與梳齒形鋼(gang)板(ban)(ban)(ban)連接，這(zhe)樣(yang)梳齒鋼(gang)板(ban)(ban)(ban)固定(ding)在斷(duan)縫(feng)(feng)兩側，通(tong)過梳齒的(de)縫(feng)(feng)隙實(shi)現(xian)斷(duan)縫(feng)(feng)處的(de)位移和變形。