Fig. 138
Put briefly, the principal of these precautions are:
Ladders should rise at least 6 feet 6 inches above the top platform they serve.
If the ladder is too short for this height to be allowed, a T piece as [fig. 138] should be fixed across the top of the ladder to give warning to the workman that he has no higher hand hold.
Ladders above 25 feet in length between foot and rest should be stayed in the centre to prevent sagging. The stay should be a wooden shaft with an iron clip. By clipping the rung as shown in [fig. 139] they do not meet the workman’s hands and feet when climbing. The same effect is gained when the top of the ladder rises considerably above the point of rest, by staying as shown on [fig. 140].
Fig. 139
Fig. 140
Ladders should have a level footing and be firmly tied to the point of rest.