Brief introduction

The square column clamp is a new type of complementary fastener designed to reinforce square and rectangular columns. With its superior construction techniques and excellent formwork-shaping performance, it eliminates the conventional pairing of tension bolts and steel pipes—commonly used in traditional wood, aluminum, and steel formwork systems—thereby significantly reducing the risk of formwork collapse. In terms of safety, wear resistance, mobility, and convenience, it offers unparalleled advantages. The square column fixture is crafted from high-strength L-shaped steel (Q500), boasting a strength 3 to 4 times greater than that of traditional Q235B steel pipes. Its unique design consists of a specially customized matching clamp paired with four individual, curved, galvanized steel plates, each equipped with evenly spaced fixed holes along their length. At one end of each plate, a diagonal bracing structure is incorporated, while the other end features a tapered wedge-shaped pin (referred to as a "plug") that precisely fits into the pre-drilled holes. After being hammered into place and tightened, this setup securely locks the limit sleeve and plate together, creating a versatile, easily removable formwork fastener ideal for reinforcing square columns, as illustrated in the diagram.

1. 400-600mm Model

This specification card is made from standard 8.0 steel. It has a total length of 1182 mm and weighs 17.28 kg. At the construction site, to distinguish between different models of square-column reinforcing bars, simply count the number of single-row square holes at one end of the card: for cards measuring 400–600 mm, there are 10 square holes. Each set includes a total of 4 such specification cards, along with 4 wedge-shaped iron pieces—perfect for quickly securing the formwork of square columns.

2. 500-800mm Model

This specification card is made from standard 8.0 steel. It has a total length of 1182 mm and weighs 17.28 kg. At the construction site, to identify the square-column reinforcing bars of this specified model, simply count the number of single-row square holes at one end of the card: for cards measuring 400–600 mm, there are 10 square holes. Each set includes a total of 4 such specification cards, along with 4 wedge-shaped iron pieces. These components can be quickly and conveniently used to securely fasten square-column formwork.

3. 700-1000mm Model

This specification card is made from standard 10.0 steel. It has a total length of 1,660 millimeters and weighs 35.08 kilograms. At the construction site, this particular type of square-column reinforcing bar component features 10 single-row square holes at one end. These can be easily identified by measuring the overall length with a tape measure. This card is a commonly used type in construction. When creating square columns of varying diameters across different floors, simply adjusting the dimensions of the card allows for quick and efficient work.

4. 900-1200mm Model

This specification card is made from standard 10.0 steel. It has a total length of 1860 mm and weighs 39.28 kg. At the construction site, each end of the square-column reinforcing bar components of this specification type features a single row of 10 square holes. Simply measure the overall length with a tape measure to easily identify them. This card is ideal for manufacturing large-diameter square columns. It can be used in various applications for square columns ranging in diameter from 900 mm to 1200 mm, offering quick adjustments and standardized efficiency.

5. 1100-1400mm Model

This specification card is made from standard 11.0 steel. It has a total length of 2,075 mm and weighs 50.3 kg. At the construction site, one end of this model-specific card features a single row of 10 square holes, easily distinguishable by measuring the overall length with a tape measure. The card is suitable for use in constructing square columns with diameters exceeding one meter. When securing large-diameter square column formwork, this innovative card significantly enhances overall installation efficiency, making it convenient for tightening, dismantling, and recycling.

6. 1300-1600mm Model

This specification card is made from standard 12.0 steel. It has a total length of 2300mm and weighs 59.08kg. At the construction site, for square column cards of this specification and model, there is a single row of 10 square holes at one end. These can be easily identified by measuring the overall length with a tape measure. The card is suitable for large-diameter square columns with an adjustable range from 1300mm to 1600mm. This is a standard fastening card that, once the formwork is erected on-site, can be directly secured to the formwork, significantly reducing installation time and allowing concrete to be poured directly afterward.

7. 1500-1800mm Model

It is constructed with two layers of welding. The card is made from 10.0-type standard steel, measuring 1500–1800 mm in total length, with an individual length of 2385 mm. This card is perfectly suited for the construction of large-diameter square columns in major engineering projects. During the custom fabrication process, the card is equipped with double-layer welding, backed by mechanical testing conducted at the Building Research Center. As a result, after rapid fastening and demolding following concrete pouring, it delivers high-quality plain concrete finishes directly on the column surface.