Section 86(2)(iii) in Bihar Building and Other Construction Workers (Regulation of Employment and Conditions of Service) Rules, 2005
(iii)that in case the bulwarks of such vessel are lower than sixty centimetres from the level of the deck of such vessel, the open edge of such bulwarks are fitted with suitable fencing to a height of at least one metre above such deck and the post and stanchions and similar parts used in such fencing are not spaced more than two metres apart;