Specifications

STANDARD SPECIFICATION - BUILDINGS
DPI REFERENCE TEXT - APRIL 2009
PAGE 12
Temporary connections - Hold Point
Hold Point: Do not attach cleats without approval.
Remove temporary cleats on completion and restore
the surface.
Enlargement of bolt holes - Hold Point
Hold Point: Do not hand ame cut or otherwise
enlarge any bolt holes without approval.
Bolts
Use Grade 4.6/S bolts unless otherwise noted.
Welding
Standard: To AS/NZS 1554.1 use GP category
welds unless otherwise noted.
Visually examine the total length of all GP welds.
Protective coating
Surface Preparation: To AS 1627.
Remove loose millscale, rust, oil, grease, dirt,
globules of weld metal, weld slag and other foreign
matter.
Priming: Apply the primer coat to the structural steel
before delivery to the site and protect from damage
during handling and transport.
Single pack zinc phosphate
Thoroughly wire brush steelwork to AS 1627.2 and
prime with one coat of single pack zinc phosphate to
APAS specication 0162/1 with a dry lm thickness
of 40 microns.
Epoxy zinc phospate
Blast clean to the recommendations of AS 1627.4
to grade Sa of AS 1627.9 and prime with one coat
of epoxy zinc phosphate to APAS specication
2971with a dry lm thickness of 45 microns.
Inorganic zinc silicate
Blast clean to recommendations of AS 1627.4 to
grade Sa of AS 1627.9 and prime with one coat of
inorganic zinc silicate to APAS specication 2908
with a dry lm thickness of 75 microns.
Site work: After erection, repair any damage to the
shop coating and apply the coating, if any, omitted
at site connections.
TIMBER & STEEL CONSTRUCTION
Time delay: Prime the steel surface as soon as
possible after surface preparation and prior to
any deterioration of the surface. If the surface is
contaminated or rust bloomed, repeat the surface
preparation before applying the primer.
4.5 LIGHT STEEL FRAMING SYSTEM
Use the Lysaght framing system designed in
accordance with Lysaght’s design manual for steel
wall framing in cyclonic areas or non-cyclonic as
applicable.
Framing: Generally 75 x 1.6 G450 studs for cyclonic
areas and 75 x 1.2 G300 studs for non-cyclonic
areas externally at 450 max crs and 75 x 1.2 G300
studs internally with top and bottom plates, heads,
mullions and bracing designed for the specic
application.
Inspection - Witness Point
Witness Point: Give sufcient notice so that
inspection may be made of steel framing erected on
site prior to lining or cladding.
Fabrication
Cut members accurately to length so that they t
rmly against abutting members. Form holes by
drilling or punching. Flare the holes for services or
provide plastic grommets.
Weld the framing using the metal inert gas (MIG)
technique or carbon arc welding. Clean the weld
and coated areas affected by welding and touch up
with zinc rich organic binder to APAS - 2916.
Cleaning: On completion of framing remove any
debris from the cavities of members.
Temporary earthing: Provide temporary earthing
during erection until the permanent earthing is
installed. Permanent earth completed steel frames
in accordance with PowerWater regulations.
Damp course: Provide a continuous damp proof
course of Super Alcor between the concrete slab
and oor plate.
Metal Roof Trusses – Hold Point
Approved manufacturer: Use metal roof trusses
prefabricated by an approved manufacturer using
Lysaght light steel framing sections.
Hold Point: Shop Drawings – Submit shop drawings
showing the truss arrangement, location, loading,
member sizes, joint details, lifting points and method
of xing and bracing.
Certication: Provide with the shop drawings
certication of the structural sufciency of the truss
and roof design supplied on a completed NT Building
Act Section 40 Certicate of Compliance form.
Steel battens
Roof Battens: Stratco 40 mm high cyclonic steel
roof batten xed to Deemed to Comply M/624/1.
Ceiling Battens: Rondo Part No. 303 cyclonic steel
ceiling batten xed to Deemed to Comply M/621/1.
4.6 TIMBER FRAMING
Identication
Branding: Brand all structural timber, oor boards
and structural plywood, under the authority of a
recognised quality assurance program applicable
to the product. Locate the brand mark on faces
or edges to be concealed in the works. Provide a
suppliers certicate showing compliance.
Inspection - Witness Point
Witness Point: Give sufcient notice so that erected
structural woodwork may be inspected before it
is covered, for example by cladding, lining and
roong.
Pressure treatment
Pressure treat all structural timbers with ACQ
Preservative Formulation in accordance with
Specifications March 2009.indd 12 11/03/2009 11:47:10 AM