Appendix B – State Variations to the BCA

Queensland variations to BCA requirements

• Primary structural elements include door jambs, window frames, reveals, architraves and skirtings.

• Chemical barriers must be able to be replenished if the life of the chemical is significantly different to that of the building.

• If using a perimeter chemical barrier, trenches must be excavated and treated while exposed, then backfilled with suitable material, and the backfill treated. On completion, a 300 mm wide x 50 mm deep concrete cap must be installed to protect against damage to the barrier.

• Two durable notices instead of the normal BCA requirement of one, must be displayed in prominent locations.

• Accessibility for re-application of chemicals, inspections and system maintenance must be assured e.g. hand sprayed perimeter chemical barriers for zero lot houses are not allowed.

Northern Territory variations to BCA requirements

• Naturally termite resistant timbers can only be used if the voracious Mastotermes species of termite is not present.
• If using barrier systems from AS3660.1, additional termite management measures are required in areas where Mastotermes darwiniensis is present.