TKL News

All about Square Tube

by TKL Steel Corp. July 7, 2022

Square tube is a versatile structural component that can also be used in appliances and fencing. Some of its common uses are steel frames for gate construction,door jambs, and grills. It can also be used in walls, rafters,floor joists,and studs for walls.

TKL Steel offers Black Iron (B.I.) and Galvanized Iron (G.I.) Square Tube in various sizes and thickness.

Size (inches): 3/4 x 3/4 , 1 x 1 ,1 ¼ x 1 ¼ , 1 ½ x 1 ½ , 2 x 2, 3 x 3, 4 x 4
Thickness (mm): 0.7, 0.9, 1.2, 1.35, 1.5, 1.8, 2.0, 2.5, 3.0, 4.0, 6.0

Square tube B.I. & G.I.

Uses of square tube

Square tube has various uses in construction.

1. Columns
Square tubes are used as columns and some of the applications are for bridges, buildings, and towers.

2. Brackets and bases
Aside from construction, square tubes are also used as brackets and bases for solar panels and solar mounts, and bases for manufacturing of trucks, trailers and rail cars.

3. Railings
Square tubes are utilized as railings for stairways, entry gates and fencing around yards due to its durability and ease of set-up.

4. Gate
Square tubes are also used in gates for added aesthetic design and appeal.

Benefits of using Square tube

Benefits of using square tube
Square tubes are used in construction due to the following benefits.

1. Consistency in shape
Square tubes have a consistent size and shape that makes it an ideal material for railing and gate construction.

2. Cost-effective
Square tubes undergo less process compared to other types of mechanical tube which reduces the cost of construction budget.

3. Sturdy
Square tubes are sturdy as they have a high tensile strength and can withstand extreme temperatures and pressures.

TKL Steel Square tube

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2018. (n.d.). Advantages and uses of square tubing. Haolijinhui Science & Technology Co., Ltd. Retrieved June 2, 2022, from
Benefits of steel pipes and tubing: News: Dunkerley Steel. James Dunkerley. (2019, February 8). Retrieved June 2, 2022, from