Multi-Frame : Solar Panel Mounting System

Multi-Cee & Multi-Zed - High strength steel sections

Multicolor Steels is engaged in erection of Multi-Frame : Solar panel mounting system across India. Our technical experts and consultants have rich experience in erection of these structures which can ensure great quality and convenient usage. To meet our customers special requirements, our strong engineering team also provides customized solutions.

Multi-Cee, Multi-Zed and other sections are structural steel members designed and produced using advanced technology, quality and customer oriented services for use as firm and long lasting supports for economical solar panel mounting systems on any type of building/ ground support.

Intelligent Roll Forming

Multi-Zed, Multi-Cee and other profiles are Roll Formed/bent using High Quality CNC machines with online measuring, cutting, punching and forming to give the Best Quality Product.

Products and Specifications

Thickness: 1.2mm to 4mmYield Strength: 245 MPa to 345 MPa, 550 MPa
Length: Upto 12000mmType: PosMAC®, Bare Galvalume,
Pre-galvanized and Hotdip galvanized
Material: CR Steel,
HR Steel, Galvanized Steel/Color coated
Galvanization Thickness:
10 microns - 120 microns


  • Ability to span long lengths using high tensile steel
  • PosMAC® Steel used has 3-4 times more life than GI coated steel
  • Light Weight hence Low Handling and Transportation Cost
  • Tailor-made section lengths hence No Wastage
  • Cost effective as steel structures have the best stiffness/price ratio
  • Structures are well protected against adverse climate conditions.
  • No site drilling/cutting required
  • 25 years of maintenance-free life
  • Easy & Fast to Assemble

Surface Treatment

  • Multicolor offers PosMAC® which is ternary alloy coated steel (Zn- 3%Mg- 2.5%Al) with high corrosion resistance developed with POSCO's own technology that is 5 to 10 times stronger resistant than that of a normal hot-dip galvanized steel sheet [GI, GI(H)] with the same coating weight.
  • Multicolor offers Cee & Zed in Galvanised coated Steel in 175GSM / 275GSM / 550GSM Coating as per customer requirement for high corrosion environment.
  • Multi-Zed and Multi-Cee made of Hot Rolled Coils are degreased, phosphated and then primer finished with Zinc Chromate Red Oxide Paint- matching test requirement of IS : 4777 and IS : 2074. Special Treatment to combat severe atmosphere corrosion can be offered.

Systems of Connections

There are three systems of connections based on design of purlins and its connections.

Structural Support for Roof Top Solar Panels

  • PosMAC® is the registered trademark of POSCO.
  • PosMAC® is a coined name applied to hot-dipped zinc-aluminium-alloy-coated steel sheets developed by POSCO.
  • PosMAC® is the registered trademark of POSCO.

About PosMAC®

PosMAC (POSCO Magnesium Aluminium alloy Coating product) is a ternary alloy coated steel (Zn- 3%Mg- 2.5%Al) with high corrosion resistance developed with POSCO's own technology.

Product characteristics
  • PosMAC is a corrosion resistant product that is 5 to 10 times stronger resistance than that of a normal hot-dip galvanized steel sheet [GI, GI(H)]with the same coating weight. PosMAC has an excellent cross-section corrosion resistance; normal thick plating products can be replaced with this product.
  • The same processing, assembly and painting process can be applied to PosMAC as one would apply to GI. 

  • High Tensile Steel
  • High tensile steel 550mpa is recommended for better strength and light weight.

  • Warranty
  • Manufacturer provides warranty of 15 years and 25 years for PosMAC® Steel (registered trademark of POSCO).

  • Corrosion resistance of PosMAC

    Why PosMAC® has excellent corrosion resistance?

  • The magnesium (Mg) in PosMAC's coating layer will accelerate the formation of a dense corrosion product called " Simonkolleite (Zn5(OH)8Cl2H2O) " which is extremely stable. When simonkolleite is formed on the surface of the coating layer in a film-like-form, it plays a role of a corrosion inhibitor for the base metal
  • In addition, the upper coating layer can be dissolved to cover the cross-section and accelerate the growth of a stable corrosion product. However red-rust can be found in the already exposed steel plate, but fortunately, the film of the corrosion products covers the cross-section and serves to prevent corrosion.
  • Design of Structure