Hollow floors also known as suspended or timber floors are simply timber joists suspended across and supported by load bearing walls under the floor.
Timber upper floor construction details.
The ends of these timber joists are built into or suspended by joist hangers from the external walls of the property.
You can then fit a thin plywood layer over the top to regulate your final floor finish.
A neat alternative with a timber joisted floor is to put 50mm timber battens on top of your floor deck at 400mm centres lay your underfloor heating pipes between the battens clip them to the deck and then cover with a lean mix screed.
Today the upper floors in most new homes are built using factory made timber i joists also known as i beams.
The width of joists is remaining 5 to 8 cm huge.
Issues to be taken into account include.
6 4 10 construction of timber floors upper floors shall be constructed in a workmanlike manner and provide satisfactory performance.
These are basically timber rsjs rolled steel joists with an i shaped cross section comprising top and bottom flanges made of softwood or lvt laminated veneer timber bonded to a tall vertical web of osb oriented strand board or a similar engineered board.
All the figures are based on normal domestic floor loadings where the floor construction is typically 18 25mm floor boards sheets with up to 12 5mm thick plasterboard and skim underneath.