1、 Preparation before budgeting
For a beginner to make a steel structure budget, some knowledge should be essential. Firstly, one should know the construction process of the steel structure, including how to obtain materials, how to cut materials, and how to construct each process. This can prevent disclosure when calculating the engineering quantity in the future, and also know where there is more loss; We also need to learn the construction specifications for steel structures, such as how to arrange the column foot pad iron, what are the requirements, and how many are the quantities; Non destructive testing is required for the butt welds of H-shaped steel. It is important to know that the H-shaped steel flange, H-shaped steel web, and the first level welds of the flange require 100% ultrasonic testing, and the second level welds of the web require 20% ultrasonic testing. It is also important to understand the norms and know which sub items are included in the process metal structure production and installation norms, as well as which sub items should be set for a specific engineering quantity, so that different sub item quantities can be clearly indicated on the calculation manuscript for future reference.
2、 The engineering quantity of the drawing
Next, you can pick up the drawings and look at them. Don’t rush to pick up the drawings and pick them up. First, check from beginning to end to see if the drawings are complete, and see which part of the drawings you want to pick up, such as the pipe gallery, frame, ladder, etc. After carefully reviewing the technical specifications of the drawings and the annotations on each page, read the drawings from beginning to end. Once you understand them, don’t rush to pick them up, You should first look at the node diagram specified in the drawing to be picked up, know the strong axis of the column, the weak axis of the column, understand the connection between beams, beams and columns, and the composite node diagram, and also specify some specific names, such as cantilever beam: and when one end of the beam is connected to the column or beam steel, and the other end is hinged to the beam, the beam model/F-L indicates the left end steel connection, and the beam model/F-R indicates the right end steel connection. When checking the engineering quantity of the drawings, the draft requirements must be clear and clear, so that future checks can determine how the original calculation was made. Different sub items must be clearly marked on the draft, such as which quantity is the frame part, which quantity is the joint platform part, and the steel models in the draft, such as Q235B and Q345B, must be clearly distinguished.
3、 How to apply quota to budget preparation
Afterwards, it is necessary to input electronic documents for easier searching and calculation in the future. After entering, the calculated quantities should be summarized according to different quota sub items, and a main material table should be prepared. When preparing the main material table, it is necessary to multiply the previous calculated quantities by losses. The loss rate varies in different places, and it is important to remember that there is no loss in the steel partition. Carefully study the quota and set the calculated engineering quantity into a budget. Remember that the budgeted quantity is the calculated net quantity. When calculating the anti-corrosion coating, it is important to remember that the steel partition is not coated with oil. Generally, the fire-resistant part of H-shaped steel is only coated with primer and not with topcoat, and all remaining parts are coated with both primer and topcoat. However, the specific drawing requirements also need to be considered. After completing the quota and summarizing all its sub items, the anti-corrosion superelevation calculation should also be carried out. Generally, the superelevation part is the anti-corrosion part multiplied by 15%. When calculating the scaffolding superelevation cost, it is calculated as 8% of the labor cost, and the quota direct cost is obtained, which is then charged. Prepare a compilation basis and a fee table. If the first party in your region requires the use of software, you can learn the software and input the budget in Excel format into a software board, or you can directly input the budget into a software version. The software is very convenient for calculating super high fees and scaffolding dismantling fees.
