There are many kinds of keels, which can be divided into wooden keels, light steel keels, aluminum alloy keels and steel keels according to different materials. According to the use position, it can be divided into ceiling keel, vertical wall keel (partition keel), floor keel and hanging keel.
Keel is mainly used as the stress frame of wall, cylinder, floor, doors and windows, ceiling and other basic materials in building decoration. The material of keel is mainly wood, which is mostly used for the production of ceiling and partition wall. Specification of wooden keel: wooden strips with rectangular or square cross section are made of wood. General specifications are 4 meters long, with 2*3cm, 3*4cm and 4*4cm.
Key points of wooden keel selection:
1. The fresh wooden keel is reddish with clear texture. If its color is dark yellow, then it is dull, which means rotten wood.
2, see whether the selected wood square section specifications meet the requirements, whether the head and tail are smooth and uniform, and the sizes are different. At the same time, the wooden keel must be straight, and the uneven wooden keel is easy to cause structural deformation.
3. Choose a wooden keel with few joints and small joints. If the knot is large and many, screws and nails will not be screwed in the knot, which will easily lead to structural instability.
4. To choose a dense and deep wooden keel, you can look at it with your fingernails. A good wooden keel will not have obvious traces.