Hong Kong Regulations

BUILDING (CONSTRUCTION) REGULATIONS - REGULATION 61

Formwork

Construction

(1) The formwork for concrete shall support safely the combined effects of all
loads so that the final concrete structure is within the limits of acceptable
dimensional tolerances.

(2) The minimum period which must elapse before formwork may be removed shall
not be less than that given in Table 10.

TABLE 10

MINIMUM PERIOD BEFORE STRIKING FORMWORK

Type of formwork Minimum period before
formwork may be removed Vertical formwork to column, walls and large beams 12
hours Soffit formwork to slabs with props left in 4 days Soffit formwork to
beams with props left in 7 days Props to slabs 10 days Props to beams 14 days
(Enacted 1990)