CS HPT-DSN.B.120 Touchdown and lift-off areas (TLOFs)

(a)General:

(1)At least one TLOF should be provided at a heliport.

(2)One TLOF should be located within the FATO or one or more TLOFs should be collocated with helicopter stands.

(b)Characteristics:

(1)A TLOF should be of sufficient size to contain a circle of diameter of at least 0.83 D of the largest helicopter the area is intended to serve.

(2)Where the TLOF is within the FATO, the TLOF should be dynamic load-bearing.

(3)Where a TLOF is collocated with a helicopter stand, the TLOF should be static load-bearing and be capable of withstanding the traffic of the helicopters that the area is intended to serve.

(4)Slopes on a TLOF should be sufficient to prevent accumulation of water on the surface of the area and should not exceed 2 per cent in any direction.

(5)Where a TLOF is located within a FATO which can contain a circle of diameter more than 1 D, the centre of the TLOF should be located not less than 0.5 D from the edge of the FATO.