Civil Engineering Reference
In-Depth Information
A range of designs for trussed rafters (i.e. each couple tied together at ceiling level) was
produced also using bolt and connector joints, but these were designed only to carry felt
roof coverings and did not prove as popular as the principal truss designs. Industrial roofs
were not neglected, with principal truss designs using the bolt and connector joint tech-
niques for pitches of 22.5ยบ spacing between 11 and 14 ft (3.354.25 m) and up to 66 ft (20.1
m) span.
Whilst roofs are still constructed using these techniques, the TDA designs are no longer
available from TRADA.
Bolt and Connector Joints
All of the TDA principal and trussed rafter designs used bolts and connectors at joints
where previously mortice and tenon, half lap or straight nailed or pegged joints would
