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QUINN TRUSSQUINN TRUSSOPEN WEB JOIST SYSTEMOPEN WEB JOIST SYSTEM
TECHNICAL DETAILSTECHNICAL DETAILS
Finished beam depths
44 19647 20244 24747 25344 29847 304
Timber sizes
Beam depth 'D'
PS8
PS10
PS210
Web type
Web dimensionsWeb dimensions
PSD01 - L70 Hanger
Simpson L70 angles as specified by design
Simpson LBV hanger Bottom member of posi beam to be notched over bottom flange of hanger
PSD02 - Bottom chord fixing to timber frame
47x97 Top chord restraint fixed between beams
PSD03 - Top chord fixing to timber frame
47x97 Packing pieces
Ring beam (size to suit)
47x47 Continuous plasterboard noggin
6 mm gap
PSD04 - Masonry hanger detailPSD04 - Masonry hanger detail
Minimum bearing determined by design (choose correct hanger for load, bearing width
and coursework level of hanger bearing flange).
47x97 Top chord restraint fixed between beams
PSD05 - Masonry hanger detailPSD05 - Masonry hanger detail(with continuous ledger)(with continuous ledger)
Minimum bearing determined by design (choose correct hanger for load, bearing width and coursework level of bearing flange
Continuous 47x97 ledger.Top chord of beam fixed to ledger
PSD06 - Bottom chord built into PSD06 - Bottom chord built into masonrymasonry
Blockwork to continue between beams to provide
restraint
PSD07 - Top chord built into masonryPSD07 - Top chord built into masonry
Continuous 47x97 ledger fixed to wall
Max 6mm gap
PSD08 - Top chord fixing to steelPSD08 - Top chord fixing to steel
47x97 Noggins between top chords
Wallplate fixed to top of steel
Timber pack fixed to beam (size ti suit)
Max 6mm gap
PSD09 - Internal bearing on bottom PSD09 - Internal bearing on bottom chordchord
47x97 top chord restraint fixed between beams
PSD10 - Non load bearing partition PSD10 - Non load bearing partition parallel to beamsparallel to beams
Wall panels skew nailed through onto noggins with a min of 2 no 3.35 dia galvanised wire
nails (length to suit).
Simpson Z35N clips
38x97 C16 (min) noggins at max 600mm centres
PSD11 - Maximum duct sizesPSD11 - Maximum duct sizes
Maximum duct sizesCode Circular Square RectanglePS8 98 90 76x178PS10 149 133 97x208
PS210 200 155 121x215
INSERT LARGE SERVICES THROUGH JOISTS BEFORE FIXING JOISTS. IT MAY NOT BE POSSIBLE AFTER JOISTS HAVE
BEEN FIXED DOWN.
PSD12 - Edge closure detailPSD12 - Edge closure detail
35mm Prefabricated edge closure pre faced with plywood with 20mm lap at the top edge
Edge closure to be supplied to site as 4.8m long lengths and cut on site as required
PSD13 - Wide stair openingPSD13 - Wide stair opening
Bottom member of posi to be notched over bottom flange of hanger
Simpson L70 angles as specified by design Simpson LBV hangers
PSD14 - Narrow stair openingPSD14 - Narrow stair opening
Trimmer to be notched over bottom flange of hanger
Simpson L70 angles as specified by design Simpson LBV hanger
Trimmer depth to be adjusted on site to suit
PSD15 - Narrow stair openingPSD15 - Narrow stair opening
Trimmer to be notched over bottom flange of hanger
Simpson L70 angles as specified by design Simpson LBV hanger
Trimmer depth to be adjusted on site to suit
PSD16 - Narrow stair openingPSD16 - Narrow stair opening
Simpson L70 angles as specified by design
Beam (depth to suit) Slotted through girders
Packing piece to pick up ceiling
PSD17 - Strongback Detail PSD17 - Strongback Detail
INSTERT STRONGBACK THROUGH JOISTS BEFORE FIXING JOISTS. IT CANNOT BE INSTALLED AFTER
JOISTS HAVE BEEN FIXED DOWN
Fix at a maximum of 4.0 metre centres
Position strongbacks either tight to the underside of top chord (shown), or alternatively tight to topside of bottom chord
35x72 (min) blocks twice nailed to top and bottom members and twice nailed to brace using 3.35x90mm long galvanised wire nails
PSD18 - Strongback Detail PSD18 - Strongback Detail
INSTERT STRONGBACK THROUGH JOISTS BEFORE FIXING JOISTS. IT CANNOT BE INSTALLED AFTER
JOISTS HAVE BEEN FIXED DOWN
Fix at a maximum of 4.0 metre centres
Position strongbacks either tight to the underside of top chord (shown), or alternatively tight to topside of bottom chord
(with built in verticals)
PSD19 - Strongback BridgingPSD19 - Strongback Bridging
Bridging joists to overlap by at least 1 joist spacing and not less than 600mm
PSD20 - Strongback SplicePSD20 - Strongback Splice
Timber splice plate fixed to strongback with 10 nails each side of splice.
Splice plate to be same section size as strongback
PSD21 - Horizontal restraint detail PSD21 - Horizontal restraint detail
35x97 timber twice nailed to bottom chord of each joist
Strap to be fixed with a minimum of four fixings of which one is to be over the third joist
