For example, C-1 drawings of the hole size of 1800 × 1500 and the construction unit sent the size of the settlement sheet 1185 × 1675 which is why. The More
They may live on the C-1 actual size, but should be expressed as: 1675x1185. Just 1185 looks like it is a bit small.
If the size of the settlement unit by the construction unit you are smiling, it is possible to open a small hole, there may be wrong calculation of the construction unit, there may be your construction drawings taken wrong, the construction unit should take 1800 * 1200 hole
The main calculation rules and the formula: 1, aluminum doors and windows, color plate group angle windows and doors, steel doors and windows installed by hole area in square meters. Purchase of finished wood doors installed, according to the purchase of the net area of ??the calculation. 2, all kinds of wooden doors and windows production and installation of the amount of windows and doors according to the window area of ??the square meter. 3, even the amount of windows and doors should be calculated, apply the corresponding door, window quota, the width of the window counted to the outside of the door frame. 4, frameless window by the fan's peripheral area calculation. 5, roll gate installation by its hole height plus 600MM multiplied by the actual width of the door in square meters. Install the electric device to set the calculation, the shutter door on the door to install the fan calculation, small door area should be deducted. 6, doors and windows fan package galvanized iron, according to the door, window hole area in square meters; doors and windows box package galvanized iron, nail rubber, nail felt according to the size of the door and window openings to extend the meter. 7, the windows and doors on the package of stainless steel plate according to the expansion of stainless steel plate area in square meters. The metal surface or soft side of the wooden door is calculated as the net area of ??the door. 8, the upper part of the ordinary doors and windows have semi-circular window, the amount of engineering should be calculated according to ordinary windows and semi-circular window, calculated by ordinary windows and semi-circular window between the horizontal line on the boundary line. 9, frameless glass door according to its hole area calculation, which part of the fixed door, part of the door to open the door, the amount of work should be calculated separately.
