Roof panels 3 8 1 roof panel connections 3 9.
Flat roof timber detail.
Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board.
Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls.
Dormer in section 3 11.
Flat roofs aren t actually flat but must slope to drain water.
Usually a flat roof is built with a slight slope to provide some drainage.
Flat roof with no permanent access and altitude not exceeding 100m 0 75 kn m udl 0 9 kn point load most areas exceeding 100m but not exceeding 200m excluding parts of scotland pennines north east england refer to bs 6399 3 1 kn m udl 0 9 kn point load.
Rainer barthel 1 loadbearing structure matthias beckh mark.
Normally a slope of inch per foot is used.
A roof which is approximately flat is called as a flat roof.
For additional stability you can also use steel joists that are built into one or both of the walls.
A cavity closer should be provided to the top of the walls to prevent fire spread and to stop damp air entering the roof space.
From there the flat roof system you choose will determine the materials you apply.
Parapet detail joists perpendicular 3 13.
Parapet detail joists parallel details in section 4.
The construction of the flat roof is similar to that of the timber upper floor.
On a basic level flat roof construction comes in the form of roofing timbers or joists as they are more commonly known or steels that are laid across two uprights walls in most cases.
Timber flat roof carports timber flat roof construction timber flat roof construction details timber flat roof deck timber flat roof detail timber flat.
Intermediate floor joist parallel 4 3.
Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading.
Having a manual for warm flat roof construction with details and a summary of rules to follow helps.
The steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure.
The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls.
The evolution of the flat roof christian schittich.
