Suspended Timber Ground Floor Minimum Clearance

When the flooring of a suspended timber framed floor is particleboard nzs 3604 2011 timber framed buildings specifies a minimum clearance of 550 mm between the underside of the particleboard and the ground paragraph 2 3 7.

Suspended timber ground floor minimum clearance.

However paragraph 6 4 1 1 in nzs 3604 2011 allows a minimum pile height above finished ground level of 150 mm. 5 1 18 laying the ground bearing floor slab. So in what situations may minimum pile heights apply. 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.

This clearance must be increased to 200 mm where access space for termite inspection is required. Generally this is given as 550 mm minimum but it may be specified as a minimum dimension of 450 mm between the ground and the bottom of the joist which will give at least. To do this a minimum ground clearance from underside of bearer to finished ground level of 150 mm should be maintained. 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.

5 2 suspended ground floors. Have the ground beneath the suspended floor graded in accordance with open link in same page 3 1 2 3. 5 1 22 installation of insulation. 20 damp proofing concrete floors.

5 1 17 ground floor slab and concrete. Where a suspended floor is constructed with particleboard flooring product suppliers specify a minimum clearance between the underside of the particleboard and the ground. Timber joists should normally have a minimum bearing. The ends of these timber joists are built into or suspended by joist hangers from the external walls of the property.

It is necessary to allow adequate ventilation and ensure durability of the timber bearer. Nzs 3604 sets a minimum height above ground for wood based products used for flooring. Hollow floors also known as suspended or timber floors are simply timber joists suspended across and supported by load bearing walls under the floor.