This reflects the weatherproofing requirements of older roofing materials like thatch and peg tiles.
Traditional timber roof structures.
Traditional cut timber pitched roof structures were in common use up until the 1970s.
Traditional or cut roof.
If the structural frame of load bearing timber is left exposed on the exterior of the building it may be.
Rafters have a tendency to flatten under gravity thrusting outwards on the walls.
For solid timber members in floors ceilings and roofs for dwellings and various companies do online calculation software.
The rafters distribute the load of the roof covering and structure to the external walls.
Not only is the volume large enough to convert into living space but the structure can generally be easily.
In larger roofs lateral restraint typically in the form of collars spanning between the rafters prevents the structure from spreading outwards.
Trada have published span tables in a new softback book called eurocode 5 span tables.
It is commonplace in wooden buildings through the 19th century.
The finished structure is readily adaptable.
A truss roof using factory made trusses which are delivered to site complete and just erected.
Bs en 1995 1 2 eurocode 5.
Design of timber structures part 1 2 general structural fire design.
The traditional option is steeply pitched rarely less than 35.