172. Construction and safe use.- The employer shall ensure at a construction site of a building or other construction work that- (a) every ladder or step-ladder used in building or other construction work is of good construction, made of sound material and of adequate strength for the purpose for which such ladder or step-ladder is used; (b) when a ladder is used as a means of communication, such ladder is lashed to a fixed structure so that while working on such ladder it does not slip; (c) a ladder or step ladder does not stand on loose bricks or other loose packing and has a level and firm footing; (d) where it is required, in case of use of fixed ladders, sufficient foot-hold and hand-hold are provided for use by the building worker; (e) every ladder is- (i) secured so as to prevent undue swaying; (ii) equally and properly supported on each of its upright; (iii) so used as not to cause undue sagging; and (iv) placed as nearly as possible at an inclination of four in one; (f) the use of all ladders and stepladders conform to the relevant national standards for their use. | 
