Types of Light Steel Keels: A Comprehensive Guide for Your Construction Needs

Navigate the world of light steel keels with ease. Learn about the diverse types available, including C-Profile, U-Profile, and more, and understand their unique characteristics, applications, and advantages.

Comprehensive List of Light Steel Keel Specifications and Models

Light steel keels are categorized by usage into ceiling keels and partition keels, and by cross-sectional shape into V-type, C-type, T-type, and L-type keels.

(1) Product Specification Series: The main specifications for partition keels are Q50, Q75, and Q100. The main specifications for ceiling keels are D38, D45, D50, and D60.

(2) Product Marking Method: The marking sequence for light steel keels is as follows: product name, code, cross-sectional shape width, height, steel plate thickness, and standard number. For example, a ceiling keel with a "C" cross-sectional shape, 50mm width, 15mm height, and 1.5mm steel plate thickness is marked as: Building Light Steel Keel DC 50X15X1.5 GB/T 11g sl.

(3) Appearance Quality: The light steel keel should have a smooth appearance with clear edges and corners, and the cut should not have burrs or deformations that affect use. The galvanized layer should not have peeling, nodules, or falling off. For defects such as corrosion, damage, black spots, and pockmarks, they should comply with the regulations in Table 2-81 when tested according to the specified method. For appearance quality inspection, visual inspection should be conducted under bright lighting conditions at a distance of 0.5m from the product. The surface of the light steel keel should be galvanized for rust prevention, with the double-sided zinc coating: first-class products not less than 120g/m², second-class products not less than 100g/m², and qualified products not less than 80g/m².

T-type and L-type keels currently do not have national standards, and the product specifications produced by various manufacturers are also different. T-type keels serve as the main keels in the ceiling keel frame, providing the framework and supporting the decorative panels, with general specifications of 1200mm and 3000mm. There are also secondary keels (transverse or horizontal bracing keels) used in the keel frame, which also support the decorative panels. The secondary keels are also T-type but are shorter, depending on the edge length of your decorative panels. For example, the secondary keel used for a 600×600 gypsum board ceiling is 600mm long. L-type keels are edge keels, mainly serving to connect the ceiling frame with the four walls or column walls of the room, and they also partially support the decorative panels, generally also being 3000mm long each.

Let me briefly explain the connections between the keels: After the suspension rod is fixed to the floor slab with an expansion bolt, it is connected to the T-type main keel using a T-type keel hanger. If the T-type main keel needs to be extended, it is fixed at the joint with a T-type keel connector. The secondary keel is connected to the main keel by a plug-in connection, which does not require accessories.

If the ceiling has additional loads or a large area, U-type load-bearing keels are required. That is, after the suspension rod is installed, the U-type main keel is first connected to the suspension rod using a U-type load-bearing keel hanger, and then the T-type longitudinal keel is connected to the U-type main keel using a T-type keel hanger...

1. T-type keel hanger: Used for connecting the T-type main keel and the suspension rod. It is only suitable for ceilings without load-bearing keels and without additional loads.

2. T-type keel connector: Used for connecting the longitudinal T-type keel, i.e., the main keel.

3. U-type keel hanger: Used for connecting the load-bearing keel (main keel) and the suspension rod.

4. T-type keel hanger: Used for connecting the U-type light steel keel with the T-type longitudinal keel.

5. U-type main keel connector: Used for extending the U-type load-bearing keel.