General notes to be read before you use this manual:

1. This Manual has been prepared for a range of roof framing designs using ENDUROTRUSS® building components manufactured or supplied by BlueScope Steel, its licensed manufacturers or dealers.

2. The ENDUROFRAME® Building System has been designed as a complete framing system.

3. All erection and connection details must be made in accordance with the relevant standard connection drawing details contained in either:

   • this manual or its supplements

   • drawings output from the ENDUROCADD® software.

4. Before commencement of any fabrication or construction, you must develop a safety management plan to cover key risks. Key risks include, but are not limited to:

   1. Working at heights

   2. Electrical safety

   3. Cuts and scratches

5. Consider and install the appropriate level of safety equipment to manage identified risks. Safety equipment that may be required includes:

   1. Personal protective equipment including safety glasses, gloves, hearing protection (when using power tools) and sunscreen;

   2. Appropriate fall protection equipment including guard rails, scaffolds, ladders, elevated platforms, safety mesh, and fall restraint harnesses

6. A temporary earth should be established during the construction of steel frames and, upon completion, the steel house frames must be permanently earthed in accordance with the requirements of local electricity authorities.

7. You should check with your local workplace health and safety authority to see what safety measures you need to put in place prior to and during construction. It is the responsibility of the installer/erector to ensure all local safe work practices are adhered to and the safety of the whole site is maintained at all times.

8. For wiring in steel wall frames, nylon grommets shall be installed to run electrical cables through.

9. Where insufficient detail is included in this manual for your project, seek specialist advice.

10. Before you commence construction:

    1. You should check with your local government authority to see if any form of prior permission or approval is required;

    2. If you want to build or construct any attached structure, you should seek advice from a suitably qualified engineer to verify the capacity of your existing structure to withstand any additional load arising from the attached structure. You should also check with your local government authority to determine any specific requirements for the attachment to existing structures;

    3. You should check with your local workplace health and safety authority to see what safety measures you need to put in place prior to and during construction. It is the responsibility of the installer/erector to ensure all local safe work practices are adhered to and the safety of the whole site is maintained at all times.

    4. Contact info@enduroframe.com.au.

11. Refer to http://www.truecore.com.au for locations where the ENDUROFRAME® Building System can be warranted.

12. Read the Important disclaimer below.

 

Important disclaimer about this construction manual

Date of Issue
This manual was issued on September, 2014. BlueScope Steel may make changes to this Manual in its sole discretion. You should check you are using the current version of the Manual before you start construction. Refer to http://www.enduroframe.com to check version.

Conditions of Use
If you use this manual, you acknowledge and agree that your use is subject to the terms and conditions in this manual. BlueScope Steel, its agents, officers, employees, subcontractors or consultants make no representations, either expressed or implied, as to the suitability of the information and data in this manual for your particular purposes. It's your responsibility to ensure the design you use is appropriate for your needs, the products you have purchased, your site and structural limitations and your building and construction capabilities. It is recommended that you obtain qualified expert advice.

Use of Genuine Materials
Structures in this manual must only be built or constructed using those genuine ENDUROTRUSS® building components made from TRUECORE® steel and made with the ENDURO® rollformer or recommended third party products. Except as otherwise provided in these terms, any warranties only apply to you (if at all) if you use the genuine BlueScope Steel or recommended third party products and method of construction.

Check Delivery
It is important that you check all materials delivered to site against your invoice before you use them in your building or construction to ensure all components have arrived, are of the appropriate quality and are ready for installation.

Limitation of Liability
By using this manual, you accept the risks and responsibility for all losses, damages, costs and other consequences resulting directly or indirectly from using this manual. Except to the extent to which liability may not lawfully be excluded or limited, BlueScope Steel will not be under or incur any liability to any person for any direct or indirect loss or damage (including, without limitation, consequential loss or damage such as loss of profit or anticipated profit, loss of use, damage to goodwill and loss due to delay) however caused (including, without limitation, breach of contract, negligence, breach of statute and/or in equity), which may be suffered or incurred in connection with this Manual.

All rights reserved. No part of this brochure may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, recording or otherwise, without written permission of BlueScope Steel Limited. ABN 16 000 011 058.

 

1.0 Scope of manual

This manual has been prepared for the construction of a trussed roof within the following parameters:

• Only ENDUROTRUSS® Framing System components made from TRUECORE® steel and made with the ENDURO® rollformer can be used

• Erection details cover construction for cyclonic and non-cyclonic buildings. (See Table below.)

• Other spacings may require additional engineering

• Trusses suitable for both sheet roof cladding and tiled construction.

This installation manual covers the installation according to the following wind classifications, roof types and truss spans.

Table 1 - Wind categories covered by this installation manual

Y = yes N = no

ENDUROTRUSS® Product performance

The ENDUROTRUSS® Framing System has been designed in accordance with relevant Australian Standards and the requirements of the Building Code of Australia 2025.

The roof framing system will perform as specified by the ENDUROCADD® software output documentation if installed in accordance with the recommendations and details set down in this manual and related references.

This manual contains vital information. PLEASE READ IT CAREFULLY.

For more information and technical support, contact: info@enduroframe.com.au

Maximum Design Gust Wind Speed (Vh) at Height (h)

Taken from AS4055-2012 Page 5 Table 2

The ultimate roof framing solution
The ENDUROTRUSS® Framing System is your opportunity to gain the competitive edge in roof construction - with added peace of mind.
It is a hassle-free and competitive system delivering a superb job without the need for specialist 'steel skilled' site labour.

You benefit from:

• ENDUROTRUSS® Framing System parts are unique, and the design is patented to keep you ahead

• On-site you receive exactly what you need — no wastage

• Just-in-time delivery means you get what you want — when you want it — and there is less likelihood of damage on site

• The ENDUROTRUSS® Framing System uses the ENDUROCADD® roof design software package, a sophisticated design and detailing package

• The ENDUROTRUSS® system is self locating eliminating the requirement for jigs to assemble even hip rafters have pre-punched holes to self-align with truncated trusses on site

• The ENDUROTRUSS® Framing System only requires fastening on one side which greatly speeds up assembly

• Trusses can either be factory or site assembled giving flexibility in delivery and installation of trusses

• Fully engineered and certified, light-weight steel roof framing

• Parts can be linked together which assists in finding and sorting components for assembly, or pre-cut for factory assembly off the rollformer

• Roof designs for most shapes of roof and ceilings

• All parts are inkjet marked making identification simple

• Easy site assembly that requires minimum skill

• The ENDUROTRUSS® system is installed similar to timber trusses making installation by timber crews simple, using standard timber brackets available for some connections;

• Available in back to back or in-line 'flush' format to reduce the volume on a truck when assembled

• Accurate dimensions

The steel framing advantage

Steel house framing has been well established in Australia for many years. Steel house frames and ENDUROTRUSS® roofing frames are strong, durable and stable. Above all:

• They don't rot or warp

• Geometrically complex trusses can be considered due to the self-jigging nature of the trusses

• They are lightweight

• They provide you with very flat roof planes

• They are pre-cambered for straight ceiling lines

Who uses The ENDUROTRUSS® Framing System?

Any builder who wants to deliver a quality job at a competitive price.

How does the ENDUROTRUSS® Framing System work?

The heart of the ENDUROTRUSS® Framing System is the patented steel truss which is computer designed and manufactured.

The computer system does everything from designing the framing, to supplying the documentation, to controlling the manufacturing equipment.

Simply give your drawings to an ENDUROTRUSS® Framing System Trained Software User and they will do the rest. We input your design data and computer-controlled roll-formers produce the required parts.

How do you use ENDUROTRUSS®?

Apart from the drawings and certification mentioned above, you get delivered to your building site the lengths of roll-formed section required for every truss (and the screws). There are no mistakes because the parts only fit one way, and all parts have identification marks printed directly onto the steel.

Before starting installation, carefully read this installation manual. Further information on fabricating and installation of the ENDUROTRUSS® Framing System can be obtained from videos which can be found at www.enduroframe.com.au/building/assembly_and_installation_videos

Fabrication check sheets and quality control sheets that demonstrate the quality control requirements for assembling the ENDUROTRUSS® system are available from your local ENDUROTRUSS® manufacturer or by contacting info@enduroframe.com.

All installation shall be done in accordance with this manual.

Framing System market difference
Make the great leap forward

Read the contents of this Installation Manual and discover how the ENDUROTRUSS® Framing System can work for you.

The ENDUROTRUSS® Framing System only requires fastening on one side which greatly speeds up the assembly process.

When designed and manufactured correctly, the trusses are certified to comply with the structural engineering software requirements of the BCA.

2.0 On-site handling

2.1 Slings

Trusses must be fully supported in either horizontal or vertical planes when being transported. Care must be taken when tying down and lifting trusses not to put an excessive pressure on chords, webs or joints. For transporting trusses in horizontal planes where a solitary Trusstite screw is used in a chord to web connection, an additional screw may be inserted to provide additional stiffness, especially for "flush" trusses.

Most trusses for single storey work may be lifted by hand, however where cranage is required, sling trusses or truss pieces from top chord panel points as shown in Figure 2.1. Slings should be located at equal distances from truss centre lines and be approximately one-third to one-half the truss length apart.

The angle between the sling legs should be 60 degrees or less and where truss spans are greater than 9000 mm, spreader bar should be used.

Where a truss span exceeds 9000 mm, a spreader bars with attachment to web-chord should be used. Never lift trusses by the apex joint alone.

Note: When manoeuvring any materials by hand, take care not to damage components. Components should be inspected on arrival to site. Damaged components may affect structural integrity.

< 9m
Approximately 1/3 to 1/2 of truss lengthVertical lifting of trusses - Truss span greater than 9.0

Figure 2.1: Handling

2.2 Roof trusses exposure and storage

Where trusses are stored on site, they should be blocked above firm ground so that they do not come into contact with the soil and to protect them from ground water:

1. If the trusses are stored horizontally, as shown in Figure 2.2, the blocking should be at 2.0m to 2.5m centres or as required at joints, to prevent bending of the trusses. Avoid using copper, chemically treated timber or EPDM based materials as blocking.

2. If the trusses are stored vertically as shown in Figure 2.3, they should be supported at the designed support locations or bottom chord panel points, and in a manner that will be prevented from tipping or toppling.

3. The truss chords should be sloped such that water drains off.

Figure 2.2: Trusses stacked horizontally

Figure 2.3: Trusses stacked vertically

3.0 Tools & equipment

Required On-site Equipment

When erecting an ENDUROTRUSS® Framing System, the following tools and safety equipment may be required.

Power Tools

• screw gun

• metal cutting saw

• hand held metal cutting saw

• angle grinder

Tool Accessories

• 8mm (5/16") hexagon socket

• Magnetic nutsetter or extension bar (length up to 150mm)

• Suitable metal cutting blade

• 8mm spanner or socket

Hand Tools

• double action tin snips

• Locking sheet metal pliers

• spirit level preferably magnetic

• chalk line

• step ladder

• vice grips

• measuring tape

Essential Safety Equipment

• eye protection (safety goggles)

• hearing protection (when using power tools)

• protective gloves

• earth leakage circuit breaker for electrical goods

• fall protection harness

• barriers, scaffolding, elevated work platforms, and any other equipment required to ensure worker safety

Angle grinder

Tin snips

Locking sheet metal pliers

Magnetic nutsetter

Magnetic Screw Guide

Measuring tape

Screw gun

Hand held metal cutting saw

4.0 Points for construction

Trusses must be installed plumb and straight
While erecting the roof, trusses must be fixed plumb and straight. After fixing, if a bow or tilt is evident, the trusses have not been installed correctly. In this case, the problem must be rectified before proceeding further.

THE TRUSSES MUST NOT BE MODIFIED ON SITE WITHOUT FIRST SEEKING ADVICE FROM A TRAINED SOFTWARE USER OR ENGINEER.

Correct direction of ENDUROTRUSS® chord profile

The direction of the channel section used for the chord should be as depicted on Truss Assembly diagrams in(see Figure 5.11.)
Trusses should be oriented as shown on the truss layout drawing provided and ensure load bearing points shown on the assembly drawings align with load bearing walls.

Material specification

ENDUROTRUSS® sections are roll-formed from TRUECORE® steel complying with AS1397:2011. The standard ENDUROTRUSS® sections are shown in Figure 4.1. In the grade shown, the number prefixed with G indicates minimum yield stress in MPa; and the number prefixed with Z or AM indicates minimum coating mass in g/m2.

0.55mm BMT, TRUECORE® G550 AM150 steel
0.75mm BMT, TRUECORE® G550 AM150 steel
1.00mm BMT, TRUECORE® G550 AM150 steel
1.20mm BMT, TRUECORE® G500 AM150 steel

S75 section and boxed S75 section

S90 section and boxed S90 section
Figure 4.1 Section types

Straightness

Trusses and rafters must be installed with an overall out of plane straightness not greater than L/500 where L is the length of the member as shown in Figure 4.2.

Differential in vertical bows between adjacent members must not exceed 1/150 of their spacing or 6mm whichever is less.

Figure 4.2 Straightness

Plumb

Out of plumb at any point along the length of the truss from top to bottom, must not exceed the minimum of h/100 or 20mm unless the trusses are specifically designed to be installed out of plumb. (See Figure 4.3 below)

Figure 4.3 Plumb

5.0 Truss identification

A summary of the description of trusses is shown in Figures 5.1 and 5.2, and a glossary of terms is indicated below.

Figure 5.1 Typical Roof truss components

Figure 5.2 Roof truss components (plan view)

Figure 5.3 Standard 'A' Truss/ Dutch Gable Truss

Standard A-Truss: An A-framed truss supported at both ends by load bearing walls. It forms the main gable roof block (Refer to Figure 5.3).

Dutch Gable Truss: A Dutch Gable truss is formed when whaling plates are fixed to the flat face of an A-truss to support common rafters.

Figure 5.4 Girder Truss

Girder Truss: A structural truss at the end of a roof block that supports incoming trusses from an adjoining block (bridge trusses). A girder truss may replace a supporting wall or beam. It can be used to support bridge trusses and may be used in lieu of an internal load bearing wall or beam (Refer to Figure 5.4). A girder truss may be either a single truss or a pair of trusses installed lip to lip.

Figure 5.5 Bridge Truss

Bridge Truss: These trusses are standard trusses or truncated trusses with the overhang removed at the heel as shown below.

Creeper Support Truss: A truss which has an angle lintel fixed to the flat face of the bottom chord. It is used to support the ends of the creeper rafters when a roof incorporates an internal hip.

Figure 5.6 Half Truss

Half Truss: A triangular shaped truss with the end web fixed vertically and at 90 degrees to the bottom chord. It is commonly used to form verandah roofs on the lower floor of two storey homes (Refer to Figure 5.6).

Figure 5.7 Truncated Truss/Hip Girder Truss

Truncated Truss: A truss of varying depth with a horizontal top chord. Truncated trusses are usually used to form a hip end (Refer to Figure 5.7).

First Station Truncated Truss: The first truncated truss in from hip end wall.

Second Station Truncated Truss: The second truncated truss from hip end wall.

Figure 5.8 Saddle Truss

Saddle Truss: A-truss with the top chords cut at the heel to form a foot cut. It is used to form a valley line when two roof planes intersect. Saddle trusses are supported by trusses or rafters below (Refer to Figure 5.8).

Truncated Saddle Truss: A saddle truss with a horizontal top chord used to form a valley line when two roof planes intersect with a hip end close to the valley. It supports hip end rafters.

Figure 5.9 Cut-off truss

Cut off truss: A standard truss with a cut to one or both ends.

Figure 5.10 Peak truss

Peak truss: A truss that helps to create four or more roof faces. The Peak truss may support one or more hip and valley lines.

Figure 5.14: A typical truss assembly sheet as produced by ENDUROCADD® SOFTWARE.

6.0 Truss Assembly

6.1 ENDUROTRUSS® Framing System marking and branding

All ENDUROTRUSS® Framing System parts are coded with information to assist erectors in the assembly process. This matches the part information shown on the assembly drawings.

All ENDUROTRUSS® Framing System parts are coded with the following on both the web and the flange of each section:

• Job Name/Number

• Truss Number

• Part Number

• Part Length

• Part Usage. 

They also contain the rollformer number and date of manufacturing for traceability purposes. Inkjet marks are truncated on shorter parts so some information may not be visible on shorter parts.

With this information, erectors can identify what the part is and where it is intended to be used in the structure. The illustration below shows how the coding works. The sections are marked when produced in accordance with Section 6.1 of this manual.

Figure 6.1 Marking and branding

So the above example illustrates that this member is for Job Number 1, it is part of truss number 7 (as numbered by the software in the construction drawings), it is part number 1 and is 7500mm in length.

6.2 Chord to chord connection identification

Connections are identified on the truss assembly sheet by a connection code. The connection detail is displayed on an ENDUROCADD® software generated connection sheet showing all the connections used in the specific job. The chord to chord connection code is displayed next to the connection on the assembly sheet. (Refer to Figure 6.2.)

Figure 6.2 Connection identification

The connection code is explained using the above example