Fasteners - hdgasa

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Zinc Metal Spraying?Suppliers of Arc Spray andFlame Spray Equipmentand ConsumablesWEARTECH (Pty) LtdTHERMAL SPRAY DIVISION187 Galjoen Street, WadevilleP.O. Box 14125, Wadeville 1422Gauteng, South AfricaTelephone: (011) 824-6010/2/3/4/5Fax: (011) 824-6090KZN - Telephone: (031) 466-4461CAPE TOWN - Telephone: - (021) 447-4728E-mail: sales@weartech.co.zaWebsite: www.weartech.co.za
The Associationis an informationcentre establishedfor the benefitof specifiers,consultants, endusers and itsmembers.HOT DIPGALVANIZINGOfficial journal of the Hot Dip Galvanizers Association Southern Africa • 2011 Volume 8 Issue 1CONTENTSISSN 1023/781XTODAY46CAPE TOWN JOHANNESBURGExecutive Director: Bob WilmotCell: 082 325 8840Email: bob@hdgasa.org.zaOffice Manager: Saskia SalvatoriCell: 082 326 6080Email: hdgasa@icon.co.zaTechnical MarketingConsultant:Hendrik SteenkampCell: 082 891 5357Email: hendrik@hdgasa.org.zaReceptionist: MarjorieMontgomerieEmail: info@hdgasa.org.zaPUBLISHED BY:Hot Dip GalvanizersAssociation Southern AfricaQuality House, Unit U4,St. Christopher Road,St.Andrews, BedfordviewP.O. Box 2212 Edenvale 1610Tel: 011 456-7960Fax: 011 454-6304Email: hdgasa@icon.co.zaWebsite: www.hdgasa.org.zaEditor and Technical MarketingDirector:Terry SmithTel: 021 797 4735Fax: 086 612 7284Cell: 082 893 3911Email: terry@hdgasa.org.zaAdvertising and Sales:Anne van VlietTel: 011 462 5073Cell: 082 775 0711Email: mwvliet@mweb.co.zaDesign and Layout: Sandra AddinallTel: 011 868 3408Fax: 011 900 1922Email: cbtdesign@adcot.co.zaReproduction and Printing:Camera PressTel: 011 334 3815Fax: 011 334 3912Email: cpress@iafrica.comViews expressed in articles andadvertisements are not necessarilythe views of HDGASA.Articles or extracts thereof maybe reproduced provided fullacknowledgement is given.Advertisers’ Index.................................................................................................................................................... 38RegularsExecutive Director’s Comment........................................................................................................................................ 2Note from the Editor ........................................................................................................................................................ 2Thermal metal sprayingMedupi Chimneys – thermal zinc metal spraying of plate girders – Platform 205m ...................................... 32Member’s News.................................................................................................................................................................... 34On the Couch ...................................................................................................................................................................... 35Stephen’s Corner“It only works when you don’t need it!”.................................................................................................................. 36Bob’s Banter .......................................................................................................................................................................... 42Duplex CoatingsThe case for duplex coating ‘systems’ must continue ............................................................................................ 43FastenersEvaluation of concrete screw-bolts.................................................................................................................................... 4An update development in the fastener industry ........................................................................................................ 6Failure of roof fixing screws – Case study .................................................................................................................... 7Gautrain uses hot dip galvanized “Lindapter” structural fixings .............................................................................. 10Fastener Availability Matrix................................................................................................................................................ 11Continuous hot dip galvanized sheetDevelopment of the LSFB industry in Southern Africa .............................................................................................. 18Galvatech 2011 .................................................................................................................................................................... 20Fasteners and lightweight steel structures .................................................................................................................... 21What is spangle? .................................................................................................................................................................. 24Galfan coated wireImproving the effect of a galvanized coating on wire to protect steel products ................................................ 28Education and TrainingNew Introductory Galvanizers Inspection Course starting 2011............................................................................ 30Revised 3-day Galvanizers Inspectors Course for 2011 ............................................................................................ 31General2011 Hot Dip Galvanizing Awards .................................................................................................................................. 26Retrofitting cantilever balconies ...................................................................................................................................... 41Front Cover: A kaleidoscope of photos showing the final centrafugal action of some hot dip galvanized bolts; some general photos ofbolts and nuts, including the residual coating thickness (90.6µm) of a holding down bolt and nut exposed for in excess of 30 years in amoderately corrosive environment; continuous hot dip galvanized sheeting, used horizontally on a building and for a light steel framedbuilding and the "Maccaferri" Galfan coated gabion wall at Hospital Bend in Cape Town.Hot Dip Galvanizing – Adding value to Steel
Page 1: 2011 Volume 8 Issue 1HOT DIP GALVAN
Page 5 and 6: Since1988 we have excelled as a hig
Page 7 and 8: Fastenerszinc coating thicknesses w
Page 9 and 10: FastenersFailure of roof fixing scr
Page 11 and 12: FastenersGeneral view of the buildi
Page 13 and 14: FastenersFastener availability matr
Page 15 and 16: FastenersTYPE OF COMPANY STEEL GRAD
Page 21 and 22: Continuous hot dip galvanized sheet
Page 30 and 31: Galfan coated wireImproving the eff
Page 32 and 33: Galfan coated wiresolution is used
Page 34: Thermal metal sprayingMedupi Chimne
Page 37 and 38: On the CouchAnna LoubserI am privil
Page 39 and 40: Stephen’s CornerThe Royal Bermuda
Page 41 and 42: Stephen’s Corner25-30% of total b
Page 43 and 44: Stephen’s CornerAs with all corro
Page 45 and 46: Duplex CoatingsThe case for duplex
Page 47 and 48: Duplex CoatingsGoing back to 1990,

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