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