-
The FC on the drawing of the gazebo ceiling is the abbreviation of gray cast iron, which is also marked with this material.
The diameter is a hole of 50 mm.
Design elevation of the ceiling surface: the net height from the ground plane to the ceiling surface after decoration.
If the budget is naturally made by the owner, it can also be included in your budget and work, and the owner will choose the auspicious style.
This is not a double-layer bidirectional, and there is only a support reinforcement in the upper part.
According to the provisions of the national standard "Code for Real Estate Surveying" GB T17986-2000, half of the construction area of an unenclosed balcony is calculated, and you should ask the real estate surveying and mapping unit of the building in this case.