Z and C Purlins

Alfa purlins girts & eve struts are secondary structural members used to support the wall and roof panels. Alfa purlins are used on the roof, girts are used on the walls, and eve struts at the intersection of sidewalls and roofs. Alfa purlins, girts, and eave struts are designed following the American Iron and Steel Institute (AISI) then cold-formed design manual. Alfa sections may be used over single spans unlapped continuously and lapped continuous span in multi-bay buildings. Alfa Z&C purlins are available in two Standard Finishes i.e., Red Oxide, Galvanized

Z and C Purlins

Specifications

TECHNICAL SPECIFICATION OF Z AND C
purlin DEPTH D Thickness(t) Mass(Kg/M) Z PURLIN C PUTLIN
F L F L
160 2.00 4.82 60 20 60 20
160 2.30 5.54 60 20 60 20
160 2.55 6.15 60 20 60 20
200 2.00 5.44 60 20 60 20
200 2.55 6.95 60 20 60 20
230 2.00 5.92 60 20 60 20
230 2.30 6.87 60 20 60 20
230 2.55 7.55 60 20 60 20
250 2.00 6.23 60 20 60 20
250 2.30 7.17 60 20 60 20
250 2.55 7.95 60 20 60 20

Typical Connection

  • Purlin requires appropriate care during storage on site
  • The period between delivery and installation to be minimized
  • Purlin should be neatly stacked on the ground on a slight slope so that water can drain out
  • On open site conditions, purlins should be protected with waterproof covers and condensation
  • In case if the bundle of purlins becomes wet, separate the purlins and wipe & dry it
Z and C typical Connection
Z and C typical Connection

Applications

    Economy
  • Savings in steel consumption upto 50% and savings in cost upto 30%
  • Savings of transportation & handling, erection and fabrication costs
  • No wastages, No surplus left-overs, since sections are supplied in exact required lengths
    • Structure
  • Sleeve system to exploit continuity concept for larger spans
  • Empirical design rules apply, hence no design problems
  • Excellent surface finish
  • Less weight per unit length compared to conventional section without sacrificing the required structural efficiency
  • Conforming to the requirements of IS-801, IS-811
    Design
  • High strength, section versatility & wide range of choice
  • Having their shear centre within the section, less liable to twist

Advantages

  • Ability to rotate 180 degrees and fit together
  • A full range of fixing accessories is supplied. Therefore no extra material needs be procured
  • Sections supplied are pre-painted hence prevents corrosion and promotes long life
  • Sections are pre-engineered, pre-punched and with complete accessories. No further fabrication required . Considerable savings in erection costs and time.

Different Z&C purlin

    HR Purlins
  • Yield Strength - 240 MPA
  • Option - Redoxide Primer Coating
    GI Purlins
  • Coating Mass - 120 GSM / 180 GSM / 275 GSM
  • Yield Strength - 240 MPA / 340 MPA / 550 MPA