QUINN TRUSS OPEN WEB JOIST SYSTEM TECHNICAL DETAILS

Finished beam depths

Web dimensions

PSD 01 - L 70 Hanger Simpson L 70 angles as specified by design Simpson LBV hanger Bottom member of posi beam to be notched over bottom flange of hanger

PSD 02 - Bottom chord fixing to timber frame 47 x 97 Top chord restraint fixed between beams

PSD 03 - Top chord fixing to timber frame 47 x 97 Packing pieces Ring beam (size to suit) 47 x 47 Continuous plasterboard noggin 6 mm gap

PSD 04 - Masonry hanger detail 47 x 97 Top chord restraint fixed between beams Minimum bearing determined by design (choose correct hanger for load, bearing width and coursework level of hanger bearing flange).

PSD 05 - Masonry hanger detail (with continuous ledger) Continuous 47 x 97 ledger. Top chord of beam fixed to ledger Minimum bearing determined by design (choose correct hanger for load, bearing width and coursework level of bearing flange

PSD 06 - Bottom chord built into masonry Blockwork to continue between beams to provide restraint

PSD 07 - Top chord built into masonry Continuous 47 x 97 ledger fixed to wall Max 6 mm gap

PSD 08 - Top chord fixing to steel Wallplate fixed to top of steel Timber pack fixed to beam (size ti suit) 47 x 97 Noggins between top chords Max 6 mm gap

PSD 09 - Internal bearing on bottom chord 47 x 97 top chord restraint fixed between beams

PSD 10 - Non load bearing partition parallel 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 Z 35 N clips 38 x 97 C 16 (min) noggins at max 600 mm centres

PSD 11 - Maximum duct sizes INSERT LARGE SERVICES THROUGH JOISTS BEFORE FIXING JOISTS. IT MAY NOT BE POSSIBLE AFTER JOISTS HAVE BEEN FIXED DOWN.

PSD 12 - Edge closure detail 35 mm Prefabricated edge closure pre faced with plywood with 20 mm lap at the top edge Edge closure to be supplied to site as 4. 8 m long lengths and cut on site as required

PSD 13 - Wide stair opening Simpson L 70 angles as specified by design Bottom member of posi to be notched over bottom flange of hanger Simpson LBV hangers

PSD 14 - Narrow stair opening Simpson L 70 angles as specified by design Trimmer to be notched over bottom flange of hanger Simpson LBV hanger Trimmer depth to be adjusted on site to suit

PSD 15 - Narrow stair opening Simpson L 70 angles as specified by design Trimmer to be notched over bottom flange of hanger Simpson LBV hanger Trimmer depth to be adjusted on site to suit

PSD 16 - Narrow stair opening Simpson L 70 angles as specified by design Packing piece to pick up ceiling Beam (depth to suit) Slotted through girders

PSD 17 - Strongback Detail Fix at a maximum of 4. 0 metre centres 35 x 72 (min) blocks twice nailed to top and bottom members and twice nailed to brace using 3. 35 x 90 mm long galvanised wire nails Position strongbacks either tight to the underside of top chord (shown), or alternatively tight to topside of bottom chord INSTERT STRONGBACK THROUGH JOISTS BEFORE FIXING JOISTS. IT CANNOT BE INSTALLED AFTER JOISTS HAVE BEEN FIXED DOWN

PSD 18 - Strongback Detail (with built in verticals) 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 INSTERT STRONGBACK THROUGH JOISTS BEFORE FIXING JOISTS. IT CANNOT BE INSTALLED AFTER JOISTS HAVE BEEN FIXED DOWN

PSD 19 - Strongback Bridging joists to overlap by at least 1 joist spacing and not less than 600 mm

PSD 20 - Strongback Splice plate to be same section size as strongback Timber splice plate fixed to strongback with 10 nails each side of splice.

PSD 21 - Horizontal restraint detail 35 x 97 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