Cargo securing for the economically minded
This is posting number 13 in a series of cargo securing advice and useful hints. These are meant for people who think economically. They do not like to waste time, muscle power, risk their health or pay fines.
Lashing methods Part 3A: Direct lashing with spring lashing
This is one of the most effective ways to prevent an item from sliding or tipping in the same direction as the lashing, i.e. forward movement is prevented by a lashing in front. In this method the tensioning is not so important as long as the lashing stays in place. More important is how strong material is used. The sticker on the product tells you the level of Lashing Capacity (LC), or the force value for which the material can be safely used. Often LC is from 1600 to 2500 daN for normal 50mm wide straps.
In the example from post 8, we lack 2.9 tons of lashing force. One spring lashing will hold 4,1 tons from sliding forward if µ=0.2 and LC=1600 daN. So, you will need just one of them. Compare this to 14 straps calculated in post 11 for same result!
Cargo Lashing Expert