What beams does the structure use? 主梁和次梁是什么规格？

Roof and floor main beams are 2.3 mm galvanized roll-formed beams; sub-beams are 1.2 mm square tubes (40 × 80 + 80 × 80).

顶、底主梁 2.3mm 镀锌罗拉梁；次梁 1.2mm 厚 40×80 + 80×80 方管。