Light steel keel is naturally good, but home improvement projects have these problems. 1, home improvement workers have done relatively few big projects, and they are not necessarily familiar with suspenders, connectors, hanging yards, etc. , the calculated figures will not be accurate. 2. Hanging poles involve welding, and home improvement companies may not have welders or good welders. 3. It is inconvenient to match defective products. After all, unlike wooden keel, you can buy it in the shop downstairs.