CFS-1
Section Properties
• Many uses in the construction, general fabrication and home handyman fields
• Roll-formed from zinc-coated and uncoated BlueScope steel
• Strength of cold formed sections has been increased from 240 and 250 MPa to 300 MPa
• Attention to quality control provides a product of uniform straightness and mass
• Economical
Cold Formed Sections
2
Applications
Cold formed steel channels and angles are suitable for a wide variety of uses such as:
STRUCTURAL -
Building Frames; Roof Trusses; Purlins and Girts; Fascias; Floor Framing;
Trestles; Bench Frames; Gates; Fences;
Cattle Grids; Television Towers;
Scaffolds; Tank Stands; Stands; Stock Crushes and Pens; Feed and Crop Drying Frames; Ladders; Hand Rails; Shelving Frames; Machinery bases; Mullions and Lintels; Exposed Beams and Columns.
MECHANICAL -
Car Trailers; Boat Trailers; Hoppers;
Truck and Bus bodies; Agricultural Machinery; Railway Rolling Stock; Jibs;
Conveyor or Crane frames; Rail or other Containers; Pallets and Storage Racks;
Ramps; Chassis; Sign Posts; Supports or Frames; Materials-handling Conveyors and Racks.
Adaptability
Many combinations of sections are possible, and the sizes of several plain channels are such that they nest readily.
This enables many structural joints and splice connections to be made without special preparation. Normal box sections are easily fabricated. Machine-controlled dimensions allow a neat fit and provide an easy method of assembly for sliding joints.
This feature enables welding or bolting with a minimum of preparation.
The BlueScope Lysaght Technical Advisory Service
For any advice and assistance in the design and fabrication of structures and products incorporatingLYSAGHTcold formed channels and angles, please contact the BlueScope Lysaght Technical Advisory Service through your nearest BlueScope Lysaght office.
Load tables are also available, on request, from BlueScope Lysaght state offices.
Material
BlueScope Lysaght’s cold formed steel channels and angles are available either zinc coated or uncoated in base metal thicknesses (BMT) of 1.0 mm, 1.6 mm, 2.5 mm and 3.0 mm depending on the section type. The materials used are zinc coated steel to AS 1397 – 2001 G300 – Z275 (300 MPa minimum yield stress, 275g/m2 minimum average coating mass) and uncoated steel to AS/NZS 1594-2002 HA300 (300 MPa minimum yield stress).
In addition, subject to minimum quantity order, BlueScope Lysaght’s cold formed steel channels and angles can be
produced from higher yield stress uncoated and zinc coated steels to meet more demanding design requirements.
Performance
LYSAGHTcold formed steel channels and angles will perform as specified if design, fabrication and fixing are in accordance with our recommendations.
Adverse Conditions
If it is intended to useLYSAGHTcold formed steel channels and angles in exposed situations within 1 km of salt marine locations, or in severe industrial or unusally corrosive environments, please contact your nearest BlueScope Lysaght office for specialised advice.
Introduction
3
General Notes
Standard Lengths
LYSAGHTPlain and Lipped Channels and Angles are available in standard stock lengths of 6000 mm.
Special Lengths
Custom cut lengths between 4000 mm and 7500 mm are available in minimum lots of one bundle of any one size. Other lengths and special tolerances are available on enquiry.
Custom Formed Shapes
If design requirements call for sections other than those listed in this brochure,
LYSAGHTcan form custom shapes up to 8 mm thick and in higher strength steels if required.
Section Properties
The section properties tables in this brochure relate to the standard range of
LYSAGHT’s cold formed steel channels and angles and their use in combined
configurations. The section properties have been determined in accordance with AS 1538 – 1988.
Specifications
The information in this brochure is correct at the time of printing. However,
specifications are subject to change without notice.
CONTENTS
Page
2 Introduction 3 General Notes 4-5 Pain Channels 6-7 Lipped Channels 8-9 Nested Channels 10-11 Lipped Channels
(Toe to Toe and Back to Back) 12 Angles
13 Other Steel Sections 14-15 Welding
4
Plain Channels
Shear
Centre Centroid
y B
x x
y
t c
D
R xO
Method of Cataloguing
Plain Channels are denoted by the letters
“LC”. In the number following these letters, the first three digits indicate the nominal web dimension of the channel in
millimetres. The last two digits indicate the thickness of material in tenths of a millimetre, e.g.
LC 03816 – Plain Channel 38 mm x 1.6 mm.
LC 05130 – Plain Channel 51 mm x 3.0 mm.
Tolerances
Web: +2 mm –1 mm for LC 12730, LC 15230.
± 1 mm for all other sections.
Flange: ± 2 mm.
Length: ± 15 mm
5
6
Lipped Channels
Shear
Centre Centroid
B
L
y
D X
C
(BMT) R3.2
y
t X
XO
Method of Cataloguing Lipped Channels are denoted by the letters “LL”. In the number following these letters, the first three digits indicate the nominal web dimension of the channel in millimetres. The last two digits indicate the thickness of material in tenths of a millimetre, e.g.
LL 06425 – Lipped Channel 64 mm x 2.5 mm.
LC 20330 – Lipped Channel 203 mm x 3.0 mm.
Tolerances
Web: ±1 mm for LL 06425 to LL 10230.
+ 2mm –1 mm for LL 12725 to LL 25430.
Flange: ± 1 mm for LL 06425 to LL 10230 (within 1 mm each side) +2 mm -1 mm for LL 12725 to LL 25430 (within 1 mm each side).
Length: + 15 mm –0.
7
8
Nested Channels
B
D X
(BMT) t 2
Average Gap
R
y
X
Plain Channels (toe to toe)
9 Plain Channels (back to back)
B
D t
X
(BMT)
R
y y
X
10
Lipped Channels
B
L
y
y
D X
t X R3.2
Lipped Channels (toe to toe)
11 Lipped Channels (back to back)
B
L
y
y
D X
t
X R3.2
12
Angles
t
Shear Centre
Centroid
B R3.2
A Cy'
Cx'
x1
y1
y1 x0
x1 y
x y
x
y0
0
Method of Cataloguing
Angles are denoted by the letters “LA”.
In the number following these letters, the first two digits indicate the dimensions of the angle in millimetres.
The last two digits indicate the thickness of material in tenths of a millimetre, e.g.
LA 4630 - Angle 46 mm x 3.0 mm
Tolerances
Legs: ±1.5 mm, equal within 1 mm for equal angles.
Length: + 15 mm – 0.
Packing
40 lengths per bundle.
Other BlueScope Lysaght Steel Sections BlueScope Lysaght manufactures an extensive range of other standard sections for the building industry.
In addition, many major BlueScope Lysaght centres have roll-forming and brake pressing equipment to manufacture these special sections outside the standard range.
For details of these other sections and facilities, consult your nearest BlueScope Lysaght office or distributor.
13 Cee & Zed Purlins
TOPSPAN61and120Sections
Zed
Cee
61 36
66mm 15
TOPSPAN 61
97mm 26
40
120
TOPSPAN 120
14
General
Cold formed sections are suitable for all types of welding, such as spot welding, seam welding, projection welding, plug welding and arc welding, all of which are applicable to both uncoated and zinc coated sections.
Fabricators generally prefer arc welding. A few typical examples of weld fillets are shown on page 15. Suitable electrode classification is E41 XX. Current should be adjusted to suit the steel thickness, but the heat input should be kept to a practicable minimum. Multiple weld beads should be avoided.
Arc welding of zinc coated sections does not differ from that of uncoated sections, except that the electrode should be applied more slowly, making sure that the zinc coating evaporates ahead of the welding seam.Adequate ventilation should be provided.
Compound Sections
In making compound beam sections by welding two channels web-to-web or toe- to-toe, the welds must be of structural quality; mere “stitching” is not satisfactory.
Intermittent fillets as per the accompanying diagram and tables are recommended. (All dimensions in millimetres).
Where concentrated forces are carried (cross-beams, partitions, etc.), the welds should be as for supports, with one short
“miss” length each side of the weld length.
For compound sections used as columns, the weld lengths given in the table can be halved, leaving the “miss” lengths as for beams.
Weld top and bottom COMPOUND BEAM
Weld
Depth D
At support Running Intermittent Weld
Miss Miss
Miss Weld Weld Weld
Intermittent Welds for Compound Sections
Lengths of Intermittent Welds for Compound Sections
Welding
The above information is given for users’ convenience as cold formed sections are supplied only in single lengths, i.e.
not attached to each other in any way.
15
Welding
Typical Welded Section Configurations
Product Descriptions
All descriptions, specifications, illustrations, drawings, data, dimensions and weights contained this catalogue, all technical literature and websites containing information from BlueScope Lysaght are approximations only.
They are intended by BlueScope Lysaght to be a general description for information and identification purposes and do not create a sale by description. BlueScope Lysaght reserves the right at any time to:
(a) supply Goods with such minor modifications from its drawings and specifications as it sees fit; and (b) alter specifications shown in its promotional literature to reflect changes made after the date of such publication.
Disclaimer, warranties and limitation of liability
This publication is intended to be an aid for all trades and professionals involved with specifying and installing LySAGhT products and not to be a substitute for professional judgement.
Terms and conditions of sale available at local BlueScope Lysaght sales offices.
Except to the extent to which liability may not lawfully be excluded or limited, BlueScope Steel Limited will not be under or incur any liability to you 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 and/or breach of statute), which you may suffer or incur in connection with this publication.
© Copyright BlueScope Steel Limited 11 January 2010
For technical information, contact [email protected] or call 1800 641417
www.lysaght.com
Please check the latest information which is always available on our website.
lysaght is a registered trademark of Bluescope steel limited, aBN 16 000 011 058.
the lysaght ® range of products is made by Bluescope steel limited trading as Bluescope lysaght.