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

ApplicationsCold formed steel channels and angles aresuitable for a wide variety of uses such as:

STRUCTURAL -

Building Frames; Roof Trusses; Purlinsand Girts; Fascias; Floor Framing;Trestles; Bench Frames; Gates; Fences;Cattle Grids; Television Towers;Scaffolds; Tank Stands; Stands; StockCrushes and Pens; Feed and Crop DryingFrames; Ladders; Hand Rails; ShelvingFrames; Machinery bases; Mullions andLintels; Exposed Beams and Columns.

MECHANICAL -

Car Trailers; Boat Trailers; Hoppers;Truck and Bus bodies; AgriculturalMachinery; Railway Rolling Stock; Jibs;Conveyor or Crane frames; Rail or otherContainers; Pallets and Storage Racks;Ramps; Chassis; Sign Posts; Supports orFrames; Materials-handling Conveyorsand Racks.

Adaptability

Many combinations of sections arepossible, and the sizes of several plainchannels are such that they nest readily.This enables many structural joints andsplice connections to be made withoutspecial preparation. Normal box sectionsare easily fabricated. Machine-controlleddimensions allow a neat fit and provide aneasy method of assembly for sliding joints.This feature enables welding or boltingwith a minimum of preparation.

The BlueScope Lysaght Technical AdvisoryServiceFor any advice and assistance in thedesign and fabrication of structures andproducts incorporating LYSAGHT cold formedchannels and angles, please contact theBlueScope Lysaght Technical AdvisoryService through your nearest BlueScopeLysaght office.

Load tables are also available, on request,from BlueScope Lysaght state offices.

MaterialBlueScope Lysaght’s cold formed steelchannels and angles are available eitherzinc coated or uncoated in base metalthicknesses (BMT) of 1.0 mm, 1.6 mm, 2.5mm and 3.0 mm depending on the sectiontype. The materials used are zinc coatedsteel to AS 1397 – 2001 G300 – Z275 (300MPa minimum yield stress, 275g/m2

minimum average coating mass) anduncoated steel to AS/NZS 1594-2002 HA300(300 MPa minimum yield stress).

In addition, subject to minimum quantityorder, BlueScope Lysaght’s cold formedsteel channels and angles can beproduced from higher yield stress uncoatedand zinc coated steels to meet moredemanding design requirements.

PerformanceLYSAGHT cold formed steel channels andangles will perform as specified if design,fabrication and fixing are in accordancewith our recommendations.

Adverse ConditionsIf it is intended to use LYSAGHT cold formedsteel channels and angles in exposedsituations within 1 km of salt marinelocations, or in severe industrial or unusallycorrosive environments, please contactyour nearest BlueScope Lysaght office forspecialised advice.

Introduction

3

General NotesStandard LengthsLYSAGHT Plain and Lipped Channels andAngles are available in standard stocklengths of 6000 mm.

Special LengthsCustom cut lengths between 4000 mm and7500 mm are available in minimum lots ofone bundle of any one size. Other lengthsand special tolerances are available onenquiry.

Custom Formed ShapesIf design requirements call for sectionsother than those listed in this brochure,LYSAGHT can form custom shapes up to8 mm thick and in higher strength steels ifrequired.

Section PropertiesThe section properties tables in thisbrochure relate to the standard range ofLYSAGHT’s cold formed steel channels andangles and their use in combinedconfigurations. The section properties havebeen determined in accordance withAS 1538 – 1988.

SpecificationsThe information in this brochure is correctat the time of printing. However,specifications are subject to changewithout notice.

CONTENTSPage2 Introduction3 General Notes4-5 Pain Channels6-7 Lipped Channels8-9 Nested Channels10-11 Lipped Channels

(Toe to Toe andBack to Back)

12 Angles13 Other Steel Sections

14-15 Welding

4

Plain Channels

ShearCentre Centroid

y B

xx

y

t

c

D

R

xO

Method of CataloguingPlain Channels are denoted by the letters“LC”. In the number following these letters,the first three digits indicate the nominalweb dimension of the channel inmillimetres. The last two digits indicate thethickness of material in tenths of amillimetre, e.g.

LC 03816 – Plain Channel38 mm x 1.6 mm.

LC 05130 – Plain Channel51 mm x 3.0 mm.

TolerancesWeb: +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

ShearCentre Centroid

B

L

y

D X

C

(BMT)

R3.2

y

t

X

XO

Method of CataloguingLipped Channels are denoted bythe letters “LL”. In the number followingthese letters, the first three digits indicatethe nominal web dimension of thechannel in millimetres. The last two digitsindicate the thickness of material intenths of a millimetre, e.g.

LL 06425 – Lipped Channel64 mm x 2.5 mm.

LC 20330 – Lipped Channel203 mm x 3.0 mm.

TolerancesWeb: ±1 mm for LL 06425 to

LL 10230.+ 2mm –1 mm for LL 12725to LL 25430.

Flange: ± 1 mm for LL 06425 toLL 10230 (within 1 mm eachside) +2 mm -1 mm forLL 12725 to LL 25430(within 1 mm each side).

Length: + 15 mm –0.

7

8

Nested ChannelsB

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

(BM

T)

R

y

y

X

10

Lipped ChannelsB

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

x 0

x1

y

xy

x

y0

0

Method of CataloguingAngles are denoted by the letters “LA”.In the number following these letters,the first two digits indicate thedimensions of the angle in millimetres.The last two digits indicate thethickness of material in tenths of amillimetre, e.g.

LA 4630 - Angle 46 mm x 3.0 mm

TolerancesLegs: ±1.5 mm, equal within

1 mm for equal angles.Length: + 15 mm – 0.

Packing40 lengths per bundle.

Other BlueScope Lysaght Steel Sections

BlueScope Lysaght manufactures anextensive range of other standard sectionsfor the building industry.

In addition, many major BlueScope Lysaghtcentres have roll-forming and brakepressing equipment to manufacture thesespecial sections outside the standardrange.

For details of these other sections andfacilities, consult your nearest BlueScopeLysaght office or distributor.

13

Cee & Zed Purlins

TOPSPAN 61 and 120 Sections

Zed

Cee

61

36

66mm 15

TOPSPAN 61

97mm 26

40

120

TOPSPAN 120

14

GeneralCold formed sections are suitable for alltypes of welding, such as spot welding,seam welding, projection welding, plugwelding and arc welding, all of which areapplicable to both uncoated and zinccoated sections.

Fabricators generally prefer arc welding. Afew typical examples of weld fillets areshown on page 15. Suitable electrodeclassification is E41 XX. Current should beadjusted to suit the steel thickness, but theheat input should be kept to a practicableminimum. Multiple weld beads should beavoided.

Arc welding of zinc coated sections doesnot differ from that of uncoated sections,except that the electrode should be appliedmore slowly, making sure that the zinccoating evaporates ahead of the weldingseam. Adequate ventilation should beprovided.

Compound SectionsIn making compound beam sections bywelding two channels web-to-web or toe-to-toe, the welds must be of structuralquality; mere “stitching” is not satisfactory.Intermittent fillets as per the accompanyingdiagram and tables are recommended. (Alldimensions in millimetres).

Where concentrated forces are carried(cross-beams, partitions, etc.), the weldsshould 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 behalved, leaving the “miss” lengths as forbeams.

Weld top and bottomCOMPOUND BEAM

Weld

DepthD

At support Running Intermittent Weld

Miss MissMiss 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

WeldingTypical 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 liabilityThis 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 steeldirect@bluescopesteel.com 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.