It s span capability and wide timber flanges make it the more desirable alternative to all steel systems.
Posi joist flat roof.
This extension to a veterinary practice in north cheam in surrey required a flat roof approximately 130 metres square.
In roof applications posi joists are incredibly versatile and can be used for flat low and steep pitched roofs.
Top hung joists can be supported from trimmers with no need for a hanger.
The following easi joist.
Posi attic trusses combines the solid feel of a posi joist with the benefits of a conventional attic truss.
Posi joist also known as metal web joists combine the light weight of timber with the strength of a steel web.
This demo version is fixed at 1m clear span.
How to install joists for a flat roof the roofing surface is installed over the joists while insulation is placed between them and the ceiling beneath is suspended from them.
Select floor or roof type.
To build a roof joist for a flat roof you need some carpentry skills and a few basic tools.
Boarding to be fastened on top of flat roof joists with a depth to width ratio greater than 4 the allowable clear spans have been calculated in accordance with bs 5268 2 2002 structural use of timber part 2.
These chords are plated together with a precision engineered and manufactured structural component called metal web these when combined form the easi joists.
The strength of the posi joist floor provides greater room widths for increased living space within the attic delivering maximum value to the client.
The full version allows any size.
Posi joist can adequately span for floors and for flat and pitched roofs often allowing for increased joist centres when compared to alternative systems.
Code of practice for permissible stress design materials and workmanship and bs 5268 7 2 1989 structural use of timber section 7 2.
The posi joist gives building designers the freedom to have a variety of internal room layouts without the constraints of solid and other engineered timber.
1 enter joist details 1 1 span and joist spacing.
Usually 400 450 or 600mm but any value can be used up to 610mm max.
Flat roof joist calculator.
This is the distance between joist centres.
Flat apartment floor.
