How to calculate the construction area of steel grid? What is the relationship between the projected area and the construction area For example, the projected area of the grid is 1100 square meters, and the building area will be larger or smaller than this number

In the case of steel structure grid, most of them are single-layer. Then his projection area is: the area surrounded by the outermost axis. For example, the rectangle is the area of axis span multiplied by width. His building area is not much more than that, except that it is surrounded by insulation layer or overhanging eaves, which must be greater than or equal to the projection area

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1. How to calculate the square area of the house? A rectangle is 31 meters long on the top and 30.4 meters long on the bottom; 27.6 meters wide on the left and 26.7 meters wide on the right. How many square meters is this? It's urgent. Please help me to calculate~
2. How to calculate the square area of the house
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7. What is the unit of the conclusion of this formula? Density * velocity square * area =? kg2/N.S This? It's strange. It's about fluid mechanics The density here is density / 9.8, for example, the oil is 980kg / m3 The density here is 980kg / m3 △ 9.8n/kg = 100kg2 / m3. N
8. What is the unit of the formula for cattle per square meter? There is a scalar is million cattle per square meter, but do not know what is the scalar? Scalar is expressed in EI? Please master answer! Thank you! The sooner the better! Sorry, I'm wrong. It's million cattle per square meter, not million cattle per square meter! thank you!
9. What are the formulas for calculating the building area of the corridor in the hall How to calculate
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