單選題 · 選擇一個答案
A rigid truck with no headboard carries 10 tonnes of rigid packets, each at least 0.5 tonne, secured by two tie downs. What minimum combined rated strength is needed?
沒有前擋板的剛性卡車，載有共10噸、每包至少0.5噸的剛性貨物，用兩條捆綁裝置固定。合計額定強度至少是多少？
Without a headboard, the rigid packets described need lashings with combined rated strength of at least twice the load's weight: 20 tonnes for a 10-tonne load.
無前擋板的剛性貨物，捆綁裝置合計額定強度至少為貨物重量2倍；10噸貨物需至少20噸。
閱讀相關知識
This calculation applies to packets weighing at least 0.5 tonne each. Correct lashing methods, suitable anchor points and the performance of the complete restraint system remain essential.
本題按每包至少0.5噸的剛性貨物計算。額定強度還須與正確捆綁方式、合適錨固點及完整約束系統配合。