The floor consists of wooden joists spaced 30 to 40 cm apart and supported on end walls over that timber boarding or planking is fixed.
Timber upper floor construction details.
Today the upper floors in most new homes are built using factory made timber i joists also known as i beams.
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 ends of these timber joists are built into or suspended by joist hangers from the external walls of the property.
The following table gives details of allowable spans and spacing between joists for the most common timber sizes used in floor construction.
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.
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.
The width of joists is remaining 5 to 8 cm huge.
Single joist timber floor is the easiest kind used for residential buildings whereas spans are short or moderate about 4 m and loads are comparatively lighter.