Timber Joist Floor Construction

Timber floor joists shall be adequate for the spans and loads and be correctly installed.

Timber joist floor construction. 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. 06 timber framed construction sacrifi cial timber construction joint 07 plywood box beam construction for detached housing 08 stairs balustrades and handrails class 1 buildings construction 09 timber flooring design guide for installation 10 timber windows and doors 11 noise transport corridor design guide 12 impact and assessment of. Kiln dried treated carcassing 9 width. There are three key things that need to be considered when constructing or renovating a timber floor.

Lintels concrete lintels metal lintels. 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 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. The span that can be achieved is determined by the size of the timber joist used.

The decision of what floor you will build needs to be made early on in the design process. Sawn carcassing timber. They are more expensive than traditional timber joists but they are much faster to fix and critically they are far easier to run services through. The weight of the timber floor itself consists of the timber joists the plasterboard ceiling underneath it except for.

Step forward the timber i joist and its cousin the posi joist. For any other situation these tables may not be appropriate and you should refer to the. Solid timber joist sizes are provided in the bs 8103 3 span tables. Between the joists the area called a joist bay and above the ceiling in some old houses is material called pugging which was used to deaden sound insulate and.

How a suspended timber floor is constructed. Insulation wall insulation loft roof insulation floor insulation insulation accessories. It is possible to create a suspended floor of any size using sleeper walls to bridge the span. Surveyors and structural engineers use data from tables below to help calculate the size of timbers necessary to give adequate support to timber floors.

Common timber sizes used in floor construction. Apa performance rated i joists pris are manufactured in accordance with pri 400 performance standard for apa ews i joists form x720 this performance standard provides an easy to use table of allowable spans for applications in residential floor construction allowing designers and builders to select and use i joists from various member manufacturers using just one set of span. The outermost joist in half timber construction may be of a more durable species than the interior joists. Floor joist span tables for surveyors floor construction.