QUINN TRUSS
OPEN WEB JOIST SYSTEM
TECHNICAL DETAILS
Finished beam depths
Web type
PS8
PS10
PS210
Timber
sizes
44
47
44
47
44
47
Beam depth
'D'
196
202
247
253
298
304
Web 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 detail
47x97 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).
PSD05 - Masonry hanger detail
(with continuous ledger)
Continuous 47x97 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
PSD06 - Bottom chord built into
masonry
Blockwork to continue
between beams to
provide restraint
PSD07 - Top chord built into masonry
Continuous 47x97 ledger
fixed to wall
Max 6mm gap
PSD08 - Top chord fixing to steel
Wallplate fixed to
top of steel
Timber pack fixed to beam
(size ti suit)
47x97 Noggins between
top chords
Max 6mm gap
PSD09 - Internal bearing on bottom
chord
47x97 top chord restraint
fixed between beams
PSD10 - 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 Z35N clips
38x97 C16 (min) noggins at
max 600mm centres
PSD11 - Maximum duct sizes
Maximum duct sizes
Code
PS8
PS10
PS210
Circular
98
149
200
Square
90
133
155
Rectangle
76x178
97x208
121x215
INSERT LARGE SERVICES THROUGH
JOISTS BEFORE FIXING JOISTS. IT MAY
NOT BE POSSIBLE AFTER JOISTS HAVE
BEEN FIXED DOWN.
PSD12 - 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 opening
Simpson L70 angles as
specified by design
Bottom member of posi to be notched
over bottom flange of hanger
Simpson LBV hangers
PSD14 - Narrow stair opening
Simpson L70 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
PSD15 - Narrow stair opening
Simpson L70 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
PSD16 - Narrow stair opening
Simpson L70 angles as
specified by design
Packing piece to pick
up ceiling
Beam (depth to suit)
Slotted through girders
PSD17 - Strongback Detail
Fix at a maximum of 4.0 metre centres
35x72 (min) blocks twice nailed to top and bottom members and twice
nailed to brace using 3.35x90mm 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
PSD18 - 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
PSD19 - Strongback Bridging
Bridging joists to overlap by at least 1 joist
spacing and not less than 600mm
PSD20 - Strongback Splice
Splice plate to be same
section size as strongback
Timber splice plate fixed to strongback with
10 nails each side of splice.
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