Posi-Joist™ - Roof Truss

Open Web Joists Open Web Joists Product Overview What is an Open Web Joist? In Essence they are Warren Girders Manufactured from TR26 Grade Truss Timber

& Steel Webs Common Questions What depths do they come in? Depths With 47mm timber on flat, there are 6 sizes of web / joist Strut Size

Overall Depth Gap Depth PS8 202mm

108mm PS9N 225mm 131mm PS10N

254mm 160mm PS12 302mm 208mm

PS14N 373mm 279mm PS16N 421mm

327mm However There are also a number of factors to consider here, like span, centres, flange width and loading conditions. Beams may also be on edge Common Questions What depths do they come in?

How are they made? Strut Runner Joists can also be made on a normal truss press but there may be problems restraining the top edge of the timber using standard truss clamps Common Questions What depths do they come in? How are they made?

What width flanges to they have? Flange Widths 47mm on edge 72mm - 147mm on flat Maximum 4ply on edge Maximum 2 ply on flat (Up to 294mm) On a standard run of joists you ideally want the flange width to be 72mm or 97mm on flat.

Maximum recommended chords on edge are 97mm Common Questions What depths do they come in? How are they made? What width flanges to they have? How do they compare in price to solid timber and I-Joists? Singly, they may be a little more

Howeve expensive. They Give better Span and fit r access for services further

RESUL T The overall job is quicker Benefits of Open Web Joist Access for services

Access for Services Note soil pipe next to the bearing Access for Services Benefits of Open Web Joist

Access for services Larger spans than cut timber & IJoist I-Joist Span Tables 241 deep, Series 550 Joist @ Rating 45 Spans 4.3m Open Web Joist Spans 254 deep PS10N Spans 5.14m Thats 0.84m more

Open Web Joist Spans Based on 400mm centres and standard loads 72mm 97mm 122mm 147mm PS 8 4880 5210

5480 5695 PS 9N 5100 5430

5685 5900 PS 10N 5520 5880

6160 6400 PS 12 6330 6760

7120 7410 Benefits of Open Web Joist Access for services Larger spans than cut timber & IJoist Inherently stable faster assembly, minimal bracing

I-Joist Bracing Requirements Open Web Joist Bracing Requirements Benefits of Open Web Joist Access for services Larger spans than cut timber & IJoist Inherently stable faster assembly, minimal bracing

Light weight Benefits of Open Web Joist Access for services Larger spans than cut timber & IJoist Inherently stable faster assembly, minimal bracing

Light weight Rigid design Joist easier manual handling than I- Benefits of Open Web Joist Access for services Larger spans than cut timber & I-Joist

Inherently stable faster assembly, minimal bracing Light weight Rigid design easier manual handling than I-Joist Squeak free cross grain shrinkage is minimal Benefits of Open Web Joist

Access for services Larger spans than cut timber & I-Joist Inherently stable faster assembly, minimal bracing Light weight

Rigid design easier manual handling than I-Joist Squeak free cross grain shrinkage is minimal Versatility Open Web Joist Versatility TRIMMABLE ENDS TOP BEARING

Open Web Joist Versatility Trend towards Multi-Storey Dwellings Open Web Joist Growth Since 1997 1997

1998 1999 2000 2001 2002

2003

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