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

• ED Decision 2019/012/R found in: EAR for ADR — Revision from June 2023

CS HPT-DSN.B.120 Touchdown and lift-off areas (TLOFs) ED Decision 2019/012/R (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 0.83D 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 1D, the centre of the TLOF should be located not less than 0.5D from the edge of the FATO.