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Anonymous users2024-01-24I'm dizzy. It's unclear to ask. It depends on the place. If you think about it this way, you have to be able to do the manhole. At least one person can get in. Minimum 800*800mm.
If there is electricity, plumbing, fire protection or equipment in the roof that needs to be overhauled, the maintenance port will be left, and if there is none, it can be left behind.
Hello, the specific height should be determined according to the height of the pipeline manhole. Generally, the height is the same, and the hole spacing left is larger, which is convenient for future maintenance.
This is so easy to deal with.
The outside of the package riser is a brick bar. >>>More
If you want to reinforce the four sides of the diamond keel ceiling, please ask a professional to reinforce.
A few pictures can be explained, no need to deliberately explain. If you're afraid of making a mistake, it's okay to mark it out.