[China Aluminum Industry] "B.4 Doors and Windows Projects" in "Appendix B Decoration Project Bill of Quantities Item and Calculation Rules" of "Guidelines for Construction Project List Price Calculation" (GB50500-2003) respectively for wooden doors and metal doors The rules for calculating quantities of metal shutter doors, other doors, wooden windows, metal windows, door and window covers, curtain boxes, curtain rails, and sill plates are stipulated as a single entity, but the “Construction Engineering Bill of Quantities Pricing Specification†does not apply to doors and windows. The cost calculation gives a specific method, so this article describes the calculation of the cost of aluminum alloy doors and windows for one of the metal doors and windows, and also hopes to use the "brick" to lead out the "jade" of the door and window technology experts and cost personnel. The "B.4 Doors and Windows Projects" in the "Appendix B Decoration Work-in-process Bill of Quantities Item and Calculation Rules" of "GB50500-2003 Construction Project Billing Code" respectively applies to wooden doors, metal doors, metal shutter doors, and other doors. The rules for calculating quantities of wood windows, windows, windows, doors and windows, curtains, window rails, and window sill plates are stipulated as a single entity. However, the "Specifications for Construction Project List Price Calculation" does not give specific methods for calculating the cost of doors and windows. Therefore, this article describes the calculation of the cost of aluminum alloy doors and windows for one of the metal doors and windows. At the same time, it also hopes to use the “brick†of the door to evoke the “jade†of the door and window technology experts and cost personnel. As a professional subcontracting project, door and window projects lead to a certain degree of technicality in the cost of doors and windows. In order to properly reduce the reliance or restraint of the door and window technology by cost-makers, the cost referred to in this article is located at the level of the design budget or construction drawing budget. To calculate the cost of doors and windows, it is necessary for the cost personnel to understand the basic composition of the doors and windows: the fixed part, the opening part, and the connection between the fixed part and the opening part—hardware. I think it is a good idea to understand the windows and doors by contrasting windows and doors with material seals against the doors and windows of the completed building. The doors and windows of the doors and windows and the doors and windows of the completed building are easily accessible or close to the owner’s cost personnel. Information or materials are more readily available to the cost of the subcontractor for the windows and doors. In order to deepen the understanding of door and window nodes for cost personnel who have not experienced the construction cost of doors and windows, the door and window nodes are briefly explained by using casement window C2418 as an example. The node 01 is the cross-section node of the fixed part of the window. The insulating glass is fixed on the window frame by a pressure wire. The function of the box corner code is to connect the transverse window frame and the vertical frame. The function of the sealant tape is to prevent the outdoor rainwater, wind or dust from entering. Inside the room, the sealing strip also acts as a buffer between the aluminum alloy window frame and the insulating glass. The node 02 is a cross-section node of the window opening portion, and the hollow glass is fixed on the sash fin by a pressure wire. The role of the fan angle code is to connect the horizontal window fan and the vertical window fan. The role of the sealant tape 3 is the same as that of the sealant tape 2. The role of the sealant tape 1 is to seal off - to prevent outdoor rain or wind or dust from entering the room. The function of the hinge is to connect the partial frame of the door and window - the opening of the window frame and window - the window fan is upright, the hinge is one of the hardware . Node 03 is a vertical section of the window opening section, and the horizontal middle box is one of the window fixing sections. The node 04 is a vertical section of the window opening section, and the reinforced middle frame also serves as one of the window fixing sections. The person controls the aluminum connecting rod to slide up and down in the groove of the window fan upright through the turning window handle, thereby realizing the lock on the aluminum connecting rod. Point right or away from the lock seat mounted on the reinforced middle frame. When the lock point is facing the lock seat, the window sash is locked; when the lock point deviates from the lock seat, the sash can be opened. Similarly, for aluminum alloy sliding windows, a person pushes and pulls a window fan through a pulley, and a window fan is locked through a window lock; for a floor spring door, a door leaf is opened through a floor spring hardware, and a door handle is conveniently opened and closed. However, the locking of the door leaf is achieved through a ground lock or a latch. (Appendix 1: Large sample of doors and windows, Appendix 2: Door and window nodes) In order to simplify the complex issues, the calculation of the cost of doors and windows is now broken down into the following five steps: 1) Read and understand the bidding documents/negotiation documents and plans/work drawings of windows and doors project 2) Compile the calculation tables, profile tables, hardware tables, panel tables, seals tables, materials inquiry
