Page 77 - Student Hand Book - Scaffolding - L&T CSTI Serampore

Scaffold classes duties and dimension

Minimum bay size Maximum bay size
Scaffold
class Length Width Length Width Max height of lift
Light 0.45 m 0.45 m 3.0 2.4 m 2. m

(2 boards) (10 boards)

Medium 0.9 m 0.9 m 2.4 m 1.8 m (8 2.0 m
(3 or 4 boards) boards)
Heavy 1.0 m 1.0 m 1.8 m 1.275 m 2.0 m
(5 boards)

Classes and their duties

Light duty – Minimum access through a scaffold. For persons with hand tools only.

Live load maximum 225kg per platform per bay. Maximum concentrated load per platform per

bay 100kg.

Used mainly by:

Electricians

Painters

Window cleaners

Light maintenance work

Medium duty – For persons with materials and hand tools.

Live load maximum 450kg per platform per bay. Maximum concentrated load per platform per
bay 150kg.

Used mainly by:

Carpenters

Welders

Glaziers

Plasterers/renderers

Heavy duty – For trades like brick layers and demolition contractors.

Live load maximum 675kg per platform per bay. Maximum concentrated load per platform per

bay 200kg.

Used mainly by:

Participant Handbook : Scaffolding 77