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Pryda - Steel Roof Truss System

"The Engineered Solution from the Truss Specialist"

Pryda Steel Roof Truss System provides for a total system approach to Light Gauge Steel Trusses' by providing both the hardware (patented Steelfast steel sections, Pryda fixing accessories and Steelfix screws) and the software (computer programmes, manufacturing and installation knowledge).

Efficiently shaped Z-sections are combined with C-sections in a truss resulting in a high performance yet practical structural solution.

Proprietary Pryda software is highly advanced and intuitive. Its easy-to-use feature allows fast design through-put and includes detailed fabrication information in a single operation.

THE PRYDA STEEL ROOF TRUSS ADVANTAGES

Prefabrication offers you the following advantages to your projects:

• Low site workers requirement due to the simplified approach to   construction
• Reduction of building materials on your site – space is   premium in today’s construction
sites
• Fast and clean because most of the preparation works are   done in Pryda’s manufacturing
facility
• Safer building site because Pryda Licensed Fabricators only   employs highly skilled
labourers and supervisors to conduct   the works at site
• COST REDUCTION due to an overall reduction in construction period

EXPERIENCE

• Company core business in roof truss industry since   1964
• Expert knowledge of roof truss technology
• Long established fabricator network staffed by experienced   personnel
• Continual R & D activities in Australia, Malaysia & Indonesia   to enhance system
   performance

GUARANTEED PERFORMANCE

• High quality G550 steel
• Designed using proven Pryda Solution software
• Efficient section shapes
• Consistent material properties
• Structural warranty

EASY & EFFICIENT

• May be factory or site fabricated
• Fast & efficient jointing using Steelfixx screws
• Specialised fixing accessories
• Consistency of fabricated shapes

LONG LASTING

• No shrinkage or warping
• Anti-corrosion coating
• Dimensionally stable
• No further treatment or painting required

QUALITY ASSURANCE

• QC tests on in-coming steel for
   o Anticorrosion coating mass
   o Tensile strength
• QC tests on finished products
   o Dimension consistency
   o Shape consistency

MATERIAL SPECIFICATION:

This includes the battens / purlins in addition to the truss chords and webs.

1. Truss members

References:

i. AS1397:2001 Table 2.2 "Mechanical Property Requirements for Structural Grades"
ii. JIS G 3302 Table 7.8 "Yield Point, Tensile Strength, Elongation and Non-aging (cold-rolled base metal used)

Steel Grade	G550
Minimum Yield Strength	550 MPa
Ultimate Tensile Strength	550 MPa
Modulus of Elasticity	200 000 MPa
Shear Modulus	80 000 MPa

Protective Coating against Corrosion

References:

i. JIS G 3302 Table 2 "Minimum coating mass on both surfaces for sheets or coils having same coating mass on both surfaces"

Galvanised Coating

- type

- class

- mass

Hot-dip zinc

Z22

220 g / m2

2. Fasteners

Unless otherwise specified in the design drawings, the fasteners used for fabrication and installation works shall be Pryda Steelfixx Hex10-16x16R (with hex head) self-drilling screws with the following specifications:

Minimum corrosion rating	Class 2 zinc-plated
Length (excluding head)	16mm
Thread density	16mm
Shank Diameter - with thread	4.80mm
without thread	3.80mm

Mechanical strength

Single shear strength	5.1 kN
Torsional strength	8.6 kN
Thread density	6.9 kN

3. Ancillary Fixings

The following range of Pryda fixings has been adopted for use in conjunction with the Steelfast Truss System:

Product Name	Product Code	Connector thickness,mm
Multigrip	MG	1.00
Triplegrip	TG	1.00
Nail-on plate	NOP A78/189	1.00
Purlin anchor	GJS	0.80
Strap brace	SB102	1.00

References:

i. AS1397:2001 Table 2.2 "Mechanical Property Requirements for Structural Grades"
ii. JIS G 3302 Table 7.8 "Yield Point, Tensile Strength, Elongation and Non-aging (cold-rolled base metal used)

Steel Grade	G250
Minimum Yield Strength	250 MPa
Minimum Tensile Strength	320 MPa

Protective Coating against Corrosion

References:

i. AS1397:2001 Table 3.1 "Coating Mass Requirements"
ii. JIS G 3302 Table 2 "Minimum coating mass on both surfaces for sheets or coils having same coating mass on both surfaces"

Galvanising coating	- type	Hot-dip zinc

Steelfix Self- drilling screw	- class	Z275 (AS1397) or Z27 (JIS G3302)

Steelfix Self- drilling screw	- mass	275 g / m2

ANTI-CORROSION SPECIFICATIONS

Galvanising coating Class		G22 (Hot-dip zinc-coated)-minimum coating 220kg/m2

Steelfix Self- drilling screw		Class 2 zinc-plated