Gram Bangla Tubes Steel Pipe & Tube

Solar mounting structures

Solar Mounting Structure Steel in Bangladesh

SHS, RHS, purlins and posts for rooftop and ground mount solar, from 2 MT, delivered by district.

Illustration: galvanized steel posts and torque tubes in a solar park under construction
Illustration

Gram Bangla Tubes Ltd. (GBTL) makes steel sections for solar mounting structures in Bangladesh, for EPC contractors, installers and fabricators. The range covers SHS, RHS, C and Z purlins, round posts and 41x41 mm strut channel. Torque tube blanks of 114.3 mm OD are made on request. Walls run from 2.0 to 4.5 mm, in pre-galvanized (GP) or MS black finish. Any of these sections can be hot dip galvanized on request.

GBTL is Bangladesh's only SSAW spiral pipe manufacturer, established in 2005, with its mill in Sonargaon, Narayanganj. Standard solar sizes have a minimum order of 2 MT. GBTL tests every batch in house and marks it for traceability. GBTL delivers factory direct to your site, by district. Use the guidance below to check zinc coating, tonnage per MW and section choice before you ask for a quote.

Buyer guide

What to specify

Galvanizing thickness and coating life

Zinc protects steel by wearing away slowly, and it wears faster near the coast and heavy industry. Coastal and industrial sites in Bangladesh see the fastest zinc loss. As a rule of thumb, coating life is roughly zinc thickness divided by yearly zinc loss. So on the same site, a thicker coat lasts longer. Solar buyers in Bangladesh typically specify hot dip galvanizing to ISO 1461, often with a zinc coat of about 85 microns. Ask for our coating data.

How much steel per MW

A rooftop solar structure typically uses about 40 to 60 tonnes of steel per MW. A ground mount structure typically uses about 45 to 70 tonnes per MW. Treat both as typical ranges, not design figures. On those typical ranges, a 2 MW ground mount plant would need roughly 90 to 140 tonnes. Actual tonnage depends on the structure design, wind load and module layout. Send GBTL your bill of materials or drawings for a quote in MT.

Choosing posts and piles

The 76.1 mm OD round post comes in 3.2 mm wall for ground posts and piles. The 88.9 mm OD post comes in 3.2 or 4.0 mm wall, for designs that need a larger section. Both come in 6 m lengths. For torque tube structures, GBTL makes a 114.3 mm OD blank on request. The blank comes in 3.6 or 4.5 mm wall and 6 to 12 m lengths. Your structural engineer confirms post size and embedment depth.

Choosing purlins, rails and frames

C purlin 100x50x20 mm, in 2.0 or 2.5 mm wall, carries modules across the rafters. C purlin 120x50x20 mm, in 2.5 mm wall, has a 20 mm deeper web. Z purlin 150x65x20 mm, in 2.0 or 2.5 mm wall, is the deepest purlin in the range. On rooftops, 41x41 mm strut channel serves as module rail and bracing. SHS 40x40 to 75x75 mm, RHS 50x100 mm and RHS 60x120 mm suit rafters, legs and frames. Your structure designer sets the spans and picks the final sizes.

Delivery, cut lengths and MOQ

GBTL delivers factory direct from its Narayanganj mill to your site, by district, across Bangladesh. Standard sections come in 6 m lengths, and torque tube blanks in 6 to 12 m. Put the cut lengths you need in your quote request. Order quantities are in metric tonnes (MT). The minimum is 2 MT for standard sizes and 20 MT for a custom size, because a custom size needs a full coil run. GBTL supplies mill test certificates on request.

Products

Solar mounting products

Pre-galvanized square hollow section steel tubes in a strapped bundle
SHS

SHS 40x40 mm

Wall
1.2 to 3.0 mm
Finish
Pre-galvanized (GP), MS black, Cold rolled black, Hot dip galvanized, on request
MOQ from 2 MT Specs →
Pre-galvanized square hollow section steel tubes in a strapped bundle
SHS

SHS 50x50 mm

Wall
2.0 to 3.0 mm
Finish
Pre-galvanized (GP), MS black, Hot dip galvanized, on request
MOQ from 2 MT Specs →
Pre-galvanized square hollow section steel tubes in a strapped bundle
SHS

SHS 60x60 mm

Wall
3.0 mm
Finish
Pre-galvanized (GP), MS black, Hot dip galvanized, on request
MOQ from 2 MT Specs →
Pre-galvanized square hollow section steel tubes in a strapped bundle
SHS

SHS 75x75 mm

Wall
3.0 to 4.0 mm
Finish
Pre-galvanized (GP), MS black, Hot dip galvanized, on request
MOQ from 2 MT Specs →
Black mild steel rectangular hollow section tubes in a strapped bundle
RHS

RHS 50x100 mm

Wall
3.0 mm
Finish
Pre-galvanized (GP), MS black, Hot dip galvanized, on request
MOQ from 2 MT Specs →
Black mild steel rectangular hollow section tubes in a strapped bundle
RHS

RHS 60x120 mm

Wall
3.0 to 4.0 mm
Finish
Pre-galvanized (GP), MS black, Hot dip galvanized, on request
MOQ from 2 MT Specs →
Galvanized steel C purlins, one in front showing the lipped C profile
C purlin

C Purlin 100x50x20 mm

Wall
2.0 to 2.5 mm
Finish
Pre-galvanized (GP), MS black, Hot dip galvanized, on request
MOQ from 2 MT Specs →
Galvanized steel C purlins, one in front showing the lipped C profile
C purlin

C Purlin 120x50x20 mm

Wall
2.5 mm
Finish
Pre-galvanized (GP), MS black, Hot dip galvanized, on request
MOQ from 2 MT Specs →
Three galvanized steel Z purlins showing the Z profile
Z purlin

Z Purlin 150x65x20 mm

Wall
2.0 to 2.5 mm
Finish
Pre-galvanized (GP), MS black, Hot dip galvanized, on request
MOQ from 2 MT Specs →
Galvanized round steel posts and a torque tube for solar mounting
Round pipe

Round Post 76.1 mm OD

Wall
3.2 mm
Finish
Pre-galvanized (GP), MS black, Hot dip galvanized, on request
MOQ from 2 MT Specs →
Galvanized round steel posts and a torque tube for solar mounting
Round pipe

Round Post 88.9 mm OD

Wall
3.2 to 4.0 mm
Finish
Pre-galvanized (GP), MS black, Hot dip galvanized, on request
MOQ from 2 MT Specs →
Slotted galvanized steel strut channels
Strut channel

Strut Channel 41x41 mm

Wall
2.0 to 2.5 mm
Finish
Pre-galvanized (GP), MS black, Hot dip galvanized, on request
MOQ from 2 MT Specs →
Galvanized round steel posts and a torque tube for solar mounting On request
Round pipe

Torque Tube Blank 114.3 mm OD

Wall
3.6 to 4.5 mm
Finish
Pre-galvanized (GP), MS black, Hot dip galvanized, on request
MOQ from 2 MT Specs →
Hot dip galvanized steel pipes in several diameters On request
Services

Hot Dip Galvanizing Service

MOQ from 2 MT Specs →

Photos are representative. Finish and size may differ from the item shown.

Minimum order quantity

Minimum order quantity for solar mounting
Order type Minimum
Standard sizes The sizes on this page, made in regular production runs. 2 MT
Custom sizes Any other size needs a full coil run, so the minimum is one coil lot. 20 MT

Solar mounting questions

What galvanizing thickness do solar mounting structures need in Bangladesh?

Solar mounting sections need a zinc coat matched to the site and the design life of the plant. Coastal and heavy industry sites in Bangladesh wear zinc faster, so they call for a thicker coat. GBTL offers hot dip galvanizing on request. Solar buyers typically specify hot dip galvanizing to ISO 1461, with a zinc coat of about 85 microns. Ask for our coating data.

How much steel does a 1 MW solar plant need in Bangladesh?

A 1 MW rooftop solar structure typically needs about 40 to 60 tonnes of steel. A 1 MW ground mount structure typically needs about 45 to 70 tonnes. These are typical ranges only, and the real figure depends on structure design, wind load and module layout.

Which solar mounting steel sizes does GBTL make as standard?

GBTL makes SHS 40x40, 50x50, 60x60 and 75x75 mm, and RHS 50x100 and 60x120 mm, as standard solar sections. The standard purlins are C purlin 100x50x20 mm, C purlin 120x50x20 mm and Z purlin 150x65x20 mm. Round posts of 76.1 and 88.9 mm OD and 41x41 mm strut channel complete the standard range. The 114.3 mm OD torque tube blank and hot dip galvanizing are available on request.

What is the minimum order quantity for solar structure steel from GBTL?

The minimum order for GBTL standard solar sections is 2 MT. A custom solar section needs a full coil run, so GBTL sets a 20 MT minimum for it. Quantities are quoted in metric tonnes and delivered to your district.

What steel sections are used for rooftop versus ground mount solar structures?

For rooftop solar, GBTL supplies 41x41 mm strut channel for rails and bracing, plus SHS and RHS for rafters and frames. Ground mount structures add 76.1 or 88.9 mm OD round posts as ground posts and piles. C purlins 100x50x20 or 120x50x20 mm, or the Z purlin 150x65x20 mm, carry the modules on either type.

Can GBTL deliver solar mounting steel to my district?

Yes, GBTL delivers solar mounting steel factory direct to site, by district, across Bangladesh, including Dhaka, Chattogram and Narayanganj. Add your district and cut lengths to the quote request, or call +88 01907 084 261, Saturday to Thursday, 9:00 to 18:00.

Request a quote

Request a quote for your solar project

Send the sizes, quantity and delivery district on WhatsApp or by phone. The GBTL sales team replies with a firm price and delivery plan.

  • Quantities in MT or pieces.
  • Delivery to your site anywhere in Bangladesh, by district.
  • Mill test certificates on request.

Prefer to talk? Call +88 01907 084 261, Saturday to Thursday, 9:00 to 18:00.

Send your request on WhatsApp

The message below is filled in for you. Add the quantity and your delivery district, then send.

Hi GBTL, quote request for solar mounting structures, quantity ____ MT, delivery to ____.

Or email info@grambanglatube.com with the sizes, quantity and delivery district.