Civil Engineering Reference
In-Depth Information
is therefore very interesting in a
resource perspective even if the
volume of material used is high.
Roof structures
The use of materials for roof struc-
tures is almost the same as for floors.
Many structural alternatives are
available through combining compo-
nents in different ways. Roofs fall
into three main categories: single
raftered, purlin and forms made of
trusses, with a smaller group known
as shell structures.
Shell structures
These structures are seldom used
despite the fact that they use mater-
ial very economically. The timber
used in shell structures must have
good strength properties. It is also
an advantage if the timber is light.
Figure 13.43: Principles for construction with massive
timber elements.
Figure 13.44: Roof trusses constructed in solid timber, some with steel cables.
