Where the tables do not apply or where there are concentrated loads floor joists should be designed by an engineer in accordance with technical requirement r5.
Ground floor timber joists.
The floor can be formed in various ways using timber joists precast concrete panels block and beam system or cast in situ with reinforced concrete.
Solid timber joist sizes are provided in the bs 8103 3 span tables.
Millions of properties have suspended timber ground floors globally with around 10 million in the uk alone.
The main aim of this flooring is to prevent the damp.
The floor boarding is support on bridging or floor joists of timber.
Ground floor hollow or timber floor.
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.
Timber floor joists shall be adequate for the spans and loads and be correctly installed.
Hollow floors also known as suspended or timber floors are simply timber joists suspended across and supported by load bearing walls under the floor.
The timber doesn t always have to be treated aside from built in ends but at just 26p a metre extra it makes sense to specify treated timber.
Suspended timber ground floors consist of the finished timber floorboards being attached to floor joists which are suspended above the subfloor of the foundation.
So the minimum is 18 for floor joists and 12 for wood beams within the building foundation.
All you need to know.
Joist are supported on the.
In this flooring timber floor is suspended from the ground level.
Upgrading floors changes the void conditions which might increase or decrease moisture build up and mould and fungal growth.
Where joists are supported on walls noggings may be required at the top flange along the wall to support the floor decking and at the bottom flange to support the plasterboard ceiling.
For ground and upper floor.
Ground floor joists can still be built into the superstructure walls so long as they are carefully sealed with mastic but these days most people opt to support them with metal joist hangers.
However it is unknown what the floor void conditions are nor the effect of insulating such floors.
A suspended floor is a ground floor with a void underneath the structure.
It can be divide into two portion.
There is two ways of placing timber floor in ground.