在傳統的(de)(de)橋(qiao)梁支撐施(shi)工(gong)中，大部分碗扣腳(jiao)手(shou)架的(de)(de)間(jian)(jian)(jian)距(ju)(ju)在1.2米(mi)以下，甚至(zhi)達到(dao)0.6米(mi)和(he)0.9米(mi)，這在工(gong)地(di)現場就(jiu)出現了空(kong)(kong)間(jian)(jian)(jian)性不足的(de)(de)缺(que)陷，工(gong)人在搭設完(wan)成后監理不能進到(dao)架體中間(jian)(jian)(jian)驗(yan)收，甚至(zhi)掉個東西都不好拿出來，盤扣式(shi)腳(jiao)手(shou)架立(li)桿采用Q345b低(di)合(he)金(jin)結構(gou)鋼，提高(gao)了承載力(li)，允(yun)許放(fang)大腳(jiao)手(shou)架步(bu)距(ju)(ju)和(he)間(jian)(jian)(jian)距(ju)(ju)，因此(ci)擴大了工(gong)人的(de)(de)施(shi)工(gong)空(kong)(kong)間(jian)(jian)(jian)和(he)監理的(de)(de)驗(yan)收空(kong)(kong)間(jian)(jian)(jian)。