191. Standards, ledger, putlogs.- The employer shall ensure at a construction site of a building or other construction work that,- (a) standards of a scaffold are - (i) plumb, where practicable; (ii) fixed sufficiently close together to secure the stability of such scaffold having regard to all the possible working situations and conditions for the intended use of such scaffold; (iii) spaced, as close as practicable, to ensure safety and stability of such scaffold; (b) adequate measures are taken to prevent displacement of a standard of a scaffold either by providing sole plate or a base plate, as necessary; (c) ledgers of metal scaffold are placed at vertical intervals with due regard to safety and stability of such scaffold; (d) bamboo ledgers are kept as nearly as possible and are placed and fastened to the standards of a scaffold with due regard to the stability of such scaffold. | 
