They can normally span greater distances than timber joists.
Suspended timber ground floor construction details.
Solid floors are a lot more substantial and require the ground to be made up in layers of ground sub base sand compacted hard core damp proof membrane insulation and concrete.
There are 2 types of floor construction used in construction today.
Floor construction concrete or timber floor.
This allows air flow and ventilation to prevent the mould and dry rot that would otherwise occur over damp ground.
The materials can be more expensive than other flooring options but there is very little needed in the way of ground preparation which makes the overall cost lower on the whole particularly for the labour involved.
The big benefit for choosing a suspended floor whether concrete or timber is that the construction is simple.
Suspended timber ground floors consist of the finished timber floorboards being attached to floor joists which are suspended above the subfloor of the foundation.
These can be classed as either suspended or solid.
These floor joists are raised above the subfloor on small supporting walls called tassel walls or sleeper walls.
Supports underneath the floor are permanent and include sleeper walls or timber props placed at regular intervals.
This construction is similar to the timber floor above but uses either pre cast concrete planks or small pre cast concrete beams with concrete blocks laid between the beams.