Timber Floor Ground Clearance

The ends of these timber joists are built into or suspended by joist hangers from the external walls of the property.

Timber floor ground clearance. Australian standard 3660 specifies the minimum clearance requirements between the ground and the underside of a subfloor. We would like to show you a description here but the site won t allow us. When the flooring of a suspended timber framed floor is particleboard nzs 3604 2011 timber framed buildings specifies a minimum clearance of 550mm between the underside of the particleboard and the ground paragraph 2 3 7. E2 as1 gives minimum heights of finished floor levels above ground for concrete slab floors and suspended timber floors the measurements depending on whether there is grass or paving outside.

My council hornsby nsw requested minimum 400mm clearance between underside of the lowest timber member and the finished ground level for visual inspection of termite barriers in accordance with parts 3 1 3 and 3 1 4 of the building code of australia and as3660 1 2000. Ncc 2019 volume two part 3 5 4 7 now has deemed to satisfy requirements for timber and composite sheet cladding to be provided with a minimum clearance between the cladding and finished ground level. Nzs 3604 sets a minimum height above ground for wood based products used for flooring. The minimum clearance between the ground and the wood structural floor joists and girders is primarily for prevention of wood rot that is caused by wood being too close to the moisture in the soil.

This clearance must be increased to 200 mm where access space for termite inspection is required. It is necessary to allow adequate ventilation and ensure durability of the timber bearer. So the minimum is 18 for floor joists and 12 for wood beams within the building foundation according to the internaitonal residential code. Ground floor hollow or timber floor.

Minimum ground clearance height mm. Hollow floors also known as suspended or timber floors are simply timber joists suspended across and supported by load bearing walls under the floor. Ground moisture rising into or entering the subfloor space can create a damp environment which encourages timber rot fungus growth and the potential for termite activity. It s not necessarily going to provide enough ventilation for a tongue and groove timber floor especially if it s in a very humid area.

To do this a minimum ground clearance from underside of bearer to finished ground level of 150 mm should be maintained.