Trussed Rafter Types
Use this page to identify common truss rafter types. Please Contact us for details of our full range.
| king post | fink | |
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cantilever |
fan |
|
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raised tie |
mono 2/1 |
|
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|
mono 2/2 |
mono 3/2 |
|
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|
queen post |
howe |
|
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|
double w |
bobtail/stub end |
|
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|
flat top (hip end) |
scissor |
|
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attic |
parallel |
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Technical Data
Design
Trusses are designed in accordance with BS5268: Part 3 & the
relevant Building Regulations.
Pitches
For economy, pitches are standardised to between 15 & 40 degrees
- we can supply to your spec.
Spacing
The usual spacing is 600mm (450mm or 400mm to support heavier
loads).
Preservation
We treat with new waterborne solutions, or with
non-corrosive, spirit-based organic solvents.
Spans
Standard trusses can be designed up to 11 metres in 35mm timber,
and 15 metres in 47mm timber. Wider spans are supplied as multiple
trusses fixed together.
Eaves
Overhang Any overhang can be supplied. NB Very large overhangs may
cause the trusses to be uneconomical.
Timber
We use kiln dried and stress graded timber to European and
British Standards.
Nailplates
We use and recommend Wolf 101 nailplates manufactured from structural grade
galvanised mild steel to BS EN 10326 Fe E 280 GZ275. 1mm thick.
