Transcription

COLORBEAM FLAT ROOF SPAN TABLES Non Cyclonic AreasCarports Awnings Patios Verandahs

ContentsCertificationPage 3Design Notes to Span TablesPage 4Technical SpecificationsPage 5Working With Colorbeam Page 6Connection DetailsPage 7How to Use Span TablesPage 9KeyA AttachedAO Attached with roof sheet overhangF Free standingFO Free standing with roof sheet overhangColorbeam Span TablesFor ease of use span tables have been categorised into typical applications for long and short spanning roof sheets.Attached Flat Roofs – pages 12 – 33Short Spanning Roof SheetApplicationsFALLFALLPage 22 – 246A6FPage 25 – 27Page 25 – 277APage 383F7FPage 28 – 30FALLPage 19 – 21flat roof span tables. FRT-1.1 November 2014.FALLPage 39 – 40FALLPage 31 – 33Page 50 – 527FO4F7AOFALLPage 47 – 49FALLFALLPage 17 – 184AFALLFALLPage 16FALLPage 47 – 496F (Optional overhang)FALLFALLPage 372FO6A (Optional overhang)3AFALLFALL2FPage 152AOPage 44 – 46Page 36FALLFALL2APage 44 – 465F Optional overhang1FO5A (Optional overhang)Page 14FALLPage 35FALL1AOPage 22 – 24FALLPage 13COLORBEAM 5FFALLFALL1FShort Spanning Roof SheetApplicationsFALL5A1ALong Spanning Roof SheetApplicationsFALLLong Spanning Roof SheetApplicationsFree standing Flat Roofs – pages 34 -55Pages 41 – 43Page 53 – 552

CertificationCOLORBEAM flat roof span tables. FRT-1.1 November 2014.3

Design NotesGeneralThese span tables have been prepared for the use of Spantec Colorbeam in a range of free standing andattached verandah, patio, awning and carport designs.Australian StandardsThe structural sections comply with the following Australian Standards. AS/NZS 4600 - 2005 Cold-formed Steel Structures AS/NZ 1170.1 2002 Structural design actions – Permanent imposed and other actions AS/NZ 1170.2 2011 Structural design actions – Wind actions AS 3566.1 - 2002 Self Drilling Screws AS 4055 - 2012 Wind Loads for Housing.All other proprietary products to be in accordance with the manufacturers specificationsLoad CombinationsThe following load combinations have been used:Dead Load0.1kpa – this does not allow for ceilingsLive LoadColorbeam span tables are designed for non-trafficable roofs.Use crawl boards during installations – see ‘Working with Colorbeam ’.Wind LoadSpan tables have been designed for five Wind Classification regions:N1 (W28), N2 (W33), N3 (W41), N4 (W50), N5 (W60)ServiceabilityDead Load: Span/300Wind Load: Span/150Maximum deflection has been limited to 20mm.Freestanding or AttachedFor the purposes of these tables, roofs are deemed to be freestanding unless they are attached to an existingstructure by at least 50% of their shortest side and the longest side does not exceed twice the length of theshortest side.Open Structures (Not Enclosed)These span tables are to be used for structures that fall within the definition of “open” buildings - i.e. two ormore sides “open” (roof cladding adjacent to an open side to be at least 500mm from adjacent building orboundary).Non Cyclonic AreaThese span tables are for use in non cyclonic areas as defined by AS 1170.2 - 2011ConnectionsConnections require the use of brackets with the minimum number of screws specified in the Colorbeam span tables.Roof PitchUse recommended minimum roof pitches as specified by roof sheet supplier. Flat roof span tables allow for amaximum roof pitch of 5º.PostsThese span tables are designed for a minimum post size of 50 x 50 x 2.5mm up to a maximum height of 3.0m.Spantec has prepared these tables for use by people skilled in the design and specification of the type ofstructures covered. Spantec accepts no responsibility for misinterpretation of the information provided oromissions. Users should satisfy themselves as to the suitability of the span tables for their applications.COLORBEAM flat roof span tables. FRT-1.1 November 2014.4

Technical SpecificationsColorbeam Spantec Colorbeam is a cold formed structural ‘box-section’ beam manufactured from two high tensile zinccoated ‘C’-sections which are fixed together by countersunk rivets on the top and bottom flanges to form arectangular hollow section. This uniquely engineered section provides benefits of superior structural performance in a light weight beam. Coupled with full zinc protective coating both internally and externally and awide range of specialised fixing brackets, Colorbeam provides a highly adaptable framing system.The information contained in this manual demonstrates the use of Colorbeam as roof members in homeimprovement applications such as patios, carports, awnings and verandahs.Material SpecificationsColorbeam is made from galvanised high tensile steel complying with AS1397-2011 G550 and has a zinccoating of 275g/m2. Base metal thicknesses are 0.6, 0.8 and 1.00mm.IdentificationThere are three standard Colorbeam identified by a standard marking systems as 2Product Description150mmCB150-16Depth of section (mm)(Colorbeam)CB1.0mmBMT100200mmCB200-20Material GaugeTotal thickness of metal at the Flange 2 x Basemetal thickness (BMT) x 1012SectionDimensionsBMTMassCB100-12100 x 500.62.13CB150-16150 x 500.83.50CB200-20200 x 501.05.10D x W (mm)Base MaterialThickness (mm)(kg/m)TolerancesDepth (mm) 1.0Width (mm) 1.0Length (mm) 1.0, - 3.0COLORBEAM flat roof span tables. FRT-1.1 November 2014.5

Working with Colorbeam Storage and handlingKeep Colorbeam dry and clear of the ground. If pack becomes wet, separate the beams, wipe them with acloth and restack so they will dry thoroughly. Handle material carefully. Painted surfaces will scratch if toolsor other beams are dragged over them.CuttingThe best way to cut Colorbeam is with a cold cutting circular saw such as the Makita model 4130.Alternatively a conventional circular saw with a metal cutting friction blade may be used but more care needsto be taken to ensure that the hot particles do not strike the Colorbeam . Ensure that all swarf is removed bythe end of the day to ensure that rust stains do not affect construction surfaces.Corrosive EnvironmentsProducts exposed to coastal environments (within 1km of breaking surf) and heavy industrial areas mayrequire an additional protective coating to extend the product’s service life. For further information pleaserefer to the BCA 2014, volume 2 part 3.4.2.2 and seek advice from an engineer.Compatibility of other materialsColorbeam should not be used in direct contact with green timber or some chemically treated timbers suchas copper arsenates. Colorbeam should not be used in contact with bare steel as the zinc coating could beconsumed by the corrosion of the steel. Also do not use in contact with lead or copper or water run-off fromthese metals.Connections to Post bases/FootingsConnection of posts to base plates, base plates to footings or slabs to be certified by a structural engineer.Supporting StructuresThe capability of supporting structures and the suitability of the method of connection of attached roofsshould be determined by a structural engineer.Crawl BoardsCrawl boards are recommended for the installation or maintenance of roofing. Temporary support or beamsat mid span is recommended to ensure structure is not deflected by temporary loads when fixed.Solvents and AcidsCare should be taken to keep solvents and acids (such as brick cleaning acids) away from painted orgalvanised steel products.Plastic Protective Film.Some Colorbeam sections are supplied with a plastic film. This should be removed at the time ofinstallation.Stock .0mCB200-204.0m8.0m9.0m5.0mCOLORBEAM flat roof span tables. FRT-1.1 November 2014.6.0m7.0m6

Connection DetailsConnections for roof framesColorbeam comes with a comprehensive range of brackets. In designing these brackets care has beentaken to maintain the clean lines of Colorbeam and to allow for construction tolerances.Brackets may be fixed with Class 3 self drilling metal Tek-screws with hitek drill points to AS 3566. Minimumsize Tek-screws 10-16x16. The minimum edge distance for screw holes is 10mm and minimum centre tocentre distance is 15mm.For each bracket connection, use the required number screws nominated on each span table. The purlin torafter example below (detail 1 ) shows 8 screws in total per bracket connection for N1 and N2 wind categories.Note: 50% of screws fixed to sides of brackets.Standard Connections142536COLORBEAM flat roof span tables. FRT-1.1 November 2014.7

Connection Details cont.79810COLORBEAM flat roof span tables. FRT-1.1 November 2014.8

How to Use the Span TablesEach span table has an associated drawing showing roof members in each application. A summary of thesecan be found in the contents. To start, find the appropriate application in the contents for your project thenrefer to the span tables on the page indicated.Below is an overall drawing legend with descriptions of spans and spacings of roof members. There are somevariations so please refer to individual span tables for specifics.WAwning frame width. The same column is used for the roof members in the same direction. In mostapplications this is the Rafter span.Maximum Fascia Beam Span, can also be used as Post spacingMaximum Rafter spacing also used for Maximum Purlin spanPMaximum Purlin spacing. This column of numbers go up to a maximum of 4500 allowing for longspanning roof sheets. See roof sheet manufacturers for spans on roof sheets.FBOMaximum Fascia Beam Overhang – See span tables for overhangs in the required applications.ROMaximum Roof Sheet Overhang. Tables with roof sheet overhangs allow for a 600mm maximum roofsheet overhang except for types 5 and 6.Requirements: 3600mm wide x 6000mm longverandah with a roof sheet overhang of 600mm.Long spanning roof sheet will be used to clear spanfrom house to fascia beam. Two posts on either endare preferred to support the verandah.WRAFTERExamples1. Attached Verandah – N1 wind categoryFALLRFASCIA BEAMROχNeed to determine:Fascia Beam size: (χ on drawings)CB 150-16ColorbeamWSolutionAttached flat roof 1AO, page14.CB150-16 Beam span table usedW 3600 (Width of Frame / Rafter span)χ 6410 (Fascia Beam span)The CB150-16 beam achieves the 6000mm spanfor the fascia beam and can be used for the rafters.Rafters can be omitted as they are not structural inthe application.COLORBEAM flat roof span tables. FRT-1.1 November 2014.WMAXIMUM ALLOWABLE SPAN (mm)BEAMN1N2 FASCIA 003600390042004500FBOScrews 10712109912RAFTER(W on drawings)FALLRafter Beam 77726992627986209

How to Use the Span TablesSolutionRequirements: 6000mm wide x 6000mm longverandah with a roof sheet overhang if possible. Themaximum span of roof sheet is 1200mm. Two postson either end are preferred to support the verandah.Attached flat roof 5A, page 23.CB200-20 Beam span table usedNeedW to determine:RAFTER2. Attached Verandah – N2 wind categoryPURLINRafter Beam size: (W rafterspan)PURLINPFALLWRAFTERPurlin Beam size: (χ purlin span / rafter spacing)χ(P purlinspacing to equal1200mm or greater)PURLINPPURLINROχCB 200-20 0840087009000Screws Req’dN1 (W28)χRoof Sheet Overhang: The beams chosen above cansupport the required 1200mm (max) roof sheet span.1200mm fits evenly 5 times across the 6m widththerefore purlins can be spaced at 1200mm. The roofsheet overhang is 25% of the actual purlin spacingused for this application.25% x 1200mm 300mm roof sheet overhang.MAXIMUM ALLOWABLE SPAN (mm)N2 7538893396The CB200-20 beams as purlins easily achieve thespan and spacing required therefore we can potentiallylook at using a smaller beam for the purlins, i.e.CB150-16 beam. On the CB150-16 table page., ifyou look under the (N2/W33) column for a ‘χ’ value(purlin span) 6000 or greater you will find the 6089.Then check the maximum purlin spacing next columnon the right which is 1892mm. This confirms thatthe CB150-16 beam as a purlin can span 6000mm atgreater than 1200mm spacing for this application.CB 150-16 Colorbeam - option for purlins onlyMAXIMUM ALLOWABLE SPAN (mm)WW 6000 (Rafter span / Width of Frame)χ 8441 (Purlin span / Rafter spacing)P 1963 (Maximum Purlin 97744443985358732408COLORBEAM flat roof span tables. FRT-1.1 November 8008100840087009000Screws Req’dN1 724149813088N2 500810

How to Use the Span Tables3. Free-standing Carport – N3 wind categorySolutionRequirements: 6.0m wide x 8.0m long carportwith maximum roof sheet span of 2100mm and nooverhang. A maximum of three posts on either side ispreferred to support the carport. This will require an‘χ’ value of at least 4000 (1/2 x overall length 8000)Free-standing flat roof 7F, pages 48-52.CB200-20 Beam span table usedNeed to determine:Rafter Beam size: (W rafter span to be 6000)(R rafter spacing to be 2000)Fascia Beam size: (χ fascia beam span to be 4000)RAFTERPurlin Beam size: (P max purlin spacing to be 2100)PURLINFALLWW 6000 (Rafter span / Width of Frame)R 3078 (Rafter spacing / purlin spanχ 6077 (Fascia beam span / column spacing)P 4500 (Maximum Purlin spacing)The CB200-20 beams exceed all the required spansand spacing required, so they can be used for any ofthe roof members. If you choose to go back to seeif the 100 or 150 beams will achieve the spans andspacing you find that the only roof member that canbe substituted is the purlin.We require a minimum 2000mm purlin span.Under the N3 column look down the column withthe ‘R’ values (used for both purlin span and rafterspacing) to find a value equal or greater than 2000.Then go across to the ‘P’ value under N3 if it isequal or greater than 2100 spacing required it canbe used. In this application both CB100-12 andCB150-16 can be used as substitutes for purlinsonly.PFASCIA BEAMRχCB 200-20 ColorbeamMAXIMUM ALLOWABLE SPAN (mm)RN1 (W28)N2 (W33)N3 (W41)N4 50045004500450045004500PRFALL1500 9000 9000 1698 9000 90001800 9000 9000 1698 9000 90002100 9000 9000 1698 9000 9000PURLIN2400W 9000 9000 1698 900090002700 9000 9000 1698 9000 90003000 9000 9000 1698 9000 9000FASCIA1698BEAM3300 9000 90009000 90003600 9000 8869 1698 9000 8869R3900 9000 8694 1698 8732 8694χ4200 9000 8534 1698 8108 85344500 9000 8388 1698 7568 83884800 8500 8254 2134 7095 82545100 8000 8130 2720 6678 81245400 7358 8014 3801 6141 79705700 6603 7907 4500 5512 78286000 5960 7806 4500 4974 76956300 5406 7711 4500 4512 75406600 4925 7622 4500 4111 73676900 4506 7538 4500 3761 72057200 4139 7458 4500 3454 70537500 3520 7383 4500 3184 69107800 3009 7310 4500 2881 67768100 2588 7242 4500 2572 66508400 2237 7147 4500 2237 65308700 1944 7023 4500 1944 641616989000 169869054500Issueflat rooftables.NovemberCOLORBEAMsteelroofspanbeamspan FRT-1.1tables.1 May 2014.20066308Screws88Req’dPR1698 90001698 90001698 90001698 90001698 9000P1698 90001698 RO 90001698 85501916 72852564 62813127 54723558 48094016 42604500 38004500 34104500 30784500 27924500 25444500 23274500 21374500 19704500 18214500 16664500n/a4500n/a4500n/aRAFTERW1212N5 (W60)2011

COLORBEAM FLAT ROOF SPAN TABLESRoof Beams for Attached Flat RoofsCarports Awnings Patios VerandahsCOLORBEAM flat roof span tables. FRT-1.1 November 2014.12

Attached Flat Roof 1ARoof Sheet – Single SpanFascia Beam – Single ASCIA 20MAXIMUM ALLOWABLE SPAN 2700300033003600390042004500FBOScrews 602956120020MAXIMUM ALLOWABLE SPAN (mm)N1N2N3N4(W28)(W33)(W41)(W50)N5(W60)CB 200-20 4500FBOScrews 38818008WFASCIA BEAMFBOχFBODrawing LegendCB 150-16 390042004500FBOScrews Req’dWRAFTERχN5(W60)FALLWMAXIMUM ALLOWABLE SPAN (mm)N1N2N3N4(W28)(W33)(W41)(W50)FALLCB 100-12 86180012COLORBEAM flat roof span tables. FRT-1.1 November 80020W:Awning frame width or rafter spanχ:Maximum post spacing or fascia beam spanFBO:Maximum fascia beam overhangNOTES:1. Span tables are to be read in conjunction with Colorbeam design notes, Technicalspecifications and Working with Colorbeam .2. All dimensions on tables are in millimetres.3. Rafters (side beams) are not structural in thisapplication and can be omitted.4. These tables may also be used for applicationsthat are at 90 degrees to the above design,providing ‘χ’ is not greater than twice ‘W’. In thismethod the roof sheet runs parallel to theattached structure.5. Values that are not listed in these tables can beinterpolated between the given values.6. For roof sheet spans check with manufacturer’sspecifications.7. Each bracket connection must have the number ofscrews as nominated at bottom of tables forspecific wind categories. Refer to technicalspecifications.13

Attached Flat Roof 1AORoof Sheet – Single Span with OverhangFascia Beam – Single OScrews MAXIMUM ALLOWABLE SPAN 2700300033003600390042004500FBOScrews Req’dRAFTERχWFASCIA BEAMROFBOχFBOW:Awning frame width or rafter spanχ:Maximum post spacing or fascia beam spanFBO:Maximum fascia beam overhangRO:Roof Sheet Overhang. Span tables allow for amaximum 600mm overhang. For overhangsgreater than 600mm and up to 900mm (see MAXIMUM ALLOWABLE SPAN 024002700300033003600390042004500FBOScrews Req’dRON5(W60)CB 200-20 ColorbeamWFASCIA BEAMDrawing LegendCB 150-16 ColorbeamWWRAFTERχN5(W60)FALLWMAXIMUM ALLOWABLE SPAN (mm)N1N2N3N4(W28)(W33)(W41)(W50)FALLCB 100-12 012162020COLORBEAM flat roof span tables. FRT-1.1 November 2014.NOTES:1. Span tables are to be read in conjunctionwith Colorbeam design notes, Technicalspecifications and Working with Colorbeam .2. All dimensions on tables are in millimetres.3. Rafters (side beams) are not structural in thisapplication and can be omitted.4. These tables may also be used for applicationsthat are at 90 degrees to the above design,providing ‘χ’ is not greater than twice ‘W’. Inthis method the roof sheet runs parallel to theattached structure.5. Values that are not listed in these tables can beinterpolated between the given values.6. For roof sheet spans check with manufacturer’sspecifications.7. Each bracket connection must have the numberof screws as nominated at bottom of tablesfor specific wind categories. Refer to technicalspecifications.8. For applications requiring 900mm roof sheetoverhang multiply;- χ values by .90- FBO values by .7014

Attached Flat Roof 2ARoof Sheet – Single SpanFascia Beam – Continuous MAXIMUM ALLOWABLE SPAN 2700300033003600390042004500FBOScrews 72675120020MAXIMUM ALLOWABLE SPAN (mm)N1N2N3N4(W28)(W33)(W41)(W50)N5(W60)CB 200-20 4500FBOScrews 2180012COLORBEAM flat roof span tables. FRT-1.1 November 2014.FALLFASCIA BEAMCB 150-16 00390042004500FBOScrews Req’dN5(W60)FALLWMAXIMUM ALLOWABLE SPAN (mm)N1N2N3N4(W28)(W33)(W41)(W50)RAFTERCB 100-12 ColorbeamFASCIA BEAMχFBODrawing LegendW:Awning frame width or rafter spanχ:Maximum post spacing or fascia beam spanFBO:Maximum fascia beam overhangNOTES:1. Span tables are to be read in conjunctionwith Colorbeam design notes, Technicalspecifications and Working with Colorbeam .2. All dimensions on tables are in millimetres.3. Rafters (side beams) are not structural in thisapplication and can be omitted.4. These tables may also be used for applicationsthat are at 90 degrees to the above design,providing the length is not greater than twice ‘W’.In this method the roof sheet runs parallel to theattached structure.5. Values that are not listed in these tables can beinterpolated between the given values.6. For roof sheet spans check with manufacturer’sspecifications.7. Each bracket connection must have the numberof screws as nominated at bottom of tablesfor specific wind categories. Refer to technicalspecifications.15

Attached Flat Roof 2AORoof Sheet – Single Span with OverhangFascia Beam – Continuous ASCIA 20CB 150-16 48023942315114120CB 200-20 ColorbeamWMAXIMUM ALLOWABLE SPAN 00300033003600390042004500FBOScrews 53118008χWFASCIA BEAMROχFBODrawing LegendMAXIMUM ALLOWABLE SPAN 00300033003600390042004500FBOScrews 042004500FBOScrews Req’dWRAFTERχN5(W60)FALLWMAXIMUM ALLOWABLE SPAN (mm)N1N2N3N4(W28)(W33)(W41)(W50)FALLCB 100-12 97180012COLORBEAM flat roof span tables. FRT-1.1 November 633447180020W:χ:Awning frame width or rafter spanFBO:Maximum fascia beam overhangMaximum post spacing or fascia beam spanNOTES:1. Span tables are to be read in conjunctionwith Colorbeam design notes, Technicalspecifications and Working with Colorbeam .2. All dimensions on tables are in millimetres.3. Rafters (side beams) are not structural in thisapplication and can be omitted.4. These tables may also be used for applicationsthat are at 90 degrees to the above design,providing the length is not greater than twice ‘W’.In this method the roof sheet runs parallel to theattached structure.5. Values that are not listed in these tables can beinterpolated between the given values.6. For roof sheet spans check with manufacturer’sspecifications.7. Each bracket connection must have the numberof screws as nominated at bottom of tablesfor specific wind categories. Refer to technicalspecifications.8. For applications requiring 900mm roof sheetoverhang multiply;- χ values by 0.9- FBO values by 0.716

Attached Flat Roof 3ARoof Sheet – Continuous Span with OverhangPurlins – Supported by PostsN5(W60)WχFALLFASCIA 26201920n/an/an/an/an/an/an/an/an/an/aFBOScrews Req’d70087008700126161256920ROχPURLINWMAXIMUM ALLOWABLE SPAN (mm)N1N2N3N4(W28)(W33)(W41)(W50)PURLINCB 100-12 ColorbeamWFALLFASCIA BEAMχFBO RODrawing LegendCB 150-16 ColorbeamWMAXIMUM ALLOWABLE SPAN 6600690072007500FBOScrews an/an/an/an/an/a107012COLORBEAM flat roof span tables. FRT-1.1 November an/a65020W:Awning frame width or purlin spanχ:Maximum post spacing or fascia beam spanFBO:Maximum fascia beam overhangRO:Roof Sheet Overhang. Span tables allow for amaximum 600mm overhang.NOTES:1. Span tables are to be read in conjunctionwith Colorbeam design notes, Technicalspecifications and Working with Colorbeam .2. All dimensions on tables are in millimetres.3. As all beams are supported by posts in thisapplication the front fascia beam is not structuraland can be omitted.4. These tables may also be used for applicationsthat are at 90 degrees to the above design,providing the length is not greater than twice ‘W’.In this method the roof sheet runs parallel to theattached structure.5. Values that are not listed in these tables can beinterpolated between the given values.6. For roof sheet spans check with manufacturer’sspecifications.7. Each bracket connection must have the numberof screws as nominated at bottom of tablesfor specific wind categories. Refer to technicalspecifications.17

Attached Flat Roof 3A cont Roof Sheet – Continuous Span with OverhangPurlins – Supported by 087009000FBOScrews 3852173198818261683n/an/an/an/an/a152012FALLFASCIA ROχPURLINWMAXIMUM ALLOWABLE SPAN (mm)N1N2N3N4(W28)(W33)(W41)(W50)PURLINCB 200-20 ColorbeamWFALLFASCIA BEAMχFBO RODrawing LegendW:Awning frame width or purlin spanχ:Maximum post spacing or fascia beam spanFBO:Maximum fascia beam overhangRO:Roof Sheet Overhang. Span tables allow for amaximum 600mm overhang.NOTES:1. Span tables are to be read in conjunctionwith Colorbeam design notes, Technicalspecifications and Wor

CB150-16 Beam span table used W 3600 (Width of Frame / Rafter span) χ 6410 (Fascia Beam span) The CB150-16 beam achieves the 6000mm span for the fascia beam and can be used for the rafters. Rafters can be omitted as they are not structural in the application. W Awning frame width. The