A.60 B.80 C.90 D.100
A.100×100 B.80×80 C.60×60 D.50×50
A.構件<12m,允許偏差為±4mm B.構件≥12m且構件<18m,允許偏差±15mm C.構件≥18m允許偏差為±20mm D.構件<12m,允許偏差為±10mm