how to calculate the amount of steel works?

Hainan Steel teach you: how to calculate the amount of steel works?

Steel is the future direction of development, civil engineering will count the amount of steel will not count the amount of a lot of people, but in the future if we do not, their wages will not go up. Steel has always been civil and separate, later steel and steel composite structure in the construction process, are the first companies to install steel structures Hainan Further turnkey construction, since such engagement will slowly close, sometimes substantially together.

1 Drawings
According to the drawings directory, check the number of clean-up drawings, check if there are any omissions.

1. Design General Information
1.1 floor space, structure, column spacing, span, structural arrangement of;
1.2 Calculation of the scope of the project: about structure, roof, walls, doors and windows, clearly the scope of the tender offer;
Selection and specifications, technical requirements 1.3 Materials;
1.4 steel paint or coating requirements, fire rating.
2. floor plan, elevation, section:

Can count doors and windows, interior and exterior ladders, roof color plate, lighting board, wall color plates, roof ventilators, canopy, downspouts, flashings revenue side pieces, such as gutters quantities. Statistics, the material shall be marked each material and specifications.

Construction of the structure of FIG. 3

1. General Information Structure Design
1.1 Material: All parts (steel columns, beams, purlins, supports, etc.) member corresponding materials, such as Q235, Q345, high-strength bolts of strength class requirements;
1.2 Quality requirements for welding: weld quality grade, non-destructive testing requirements, such as welding seam quality should reach a level requiring 100% testing, two weld inspection 20%, related to the calculation of the cost of non-destructive testing.
1.3 rust requirements: hand and power tools rust (St), jet or projectile rust (Sa). Different grades of rust, rust cost different.
1.4 paint (painting) requirements: types of paint, brushing a few times, film thickness and fire rating, fire resistance of various parts.
2. floor plan, elevation, section, node detail:
2.1 Quantities may be sequentially calculated as follows:
2.1.1 embedded iron include: embedded positioning plate, embedded bolts, nuts;
2.1.2 steel columns, wind column, beam, crane beam;
2.1.3 support the roof, tied between columns support the canopy frame;
2.1.4 roof purlins, wall purlins, roof and wall purlins bracing, rod;
2.1.5 the calculation process, pay attention to calculate the coupling member, plate, roof and wall purlin crane beams and columns of pallets, bracing with steel columns, beams connecting plate, oblique rod steel casing of engineering, Note that counts the number of high-strength bolts.
2.2 drawing lists of materials, you can check turn the table below according to the material part number table part size, size, quantity is accurate, whether the count less leakage count, count wrong place.
2.3 Note that if there are design changes and modifications, supplementary explanation, answering the like.

4 calculation process should pay attention to matters

1. For the calculation of Hainan Steel Works format
1.1 Hainan steel weight unit kg, area units m2, unit of length m, the results are rounded to one decimal.
1.2 calculate the weight member, may be part of an assembly from bottom to top, left to right number, and this order is calculated.
1.3 Calculation formula format:
1.3.1 Sheet: Specification × length × width × Number
As -6 × 500 × 300 × 5, represents the part thickness δ = 6mm, length of plates 500mm, width 300mm, the number has five.
Weight calculation is: 6 × 0.5 × 0.3 × 7.85 × 5 = 35.3kg
1.3.2 Profile: specifications, the length × number × gravity
As L50 × 5, L = 3500mm × 5 × 3.77, showing limb width 50mm equilateral angles, length of 3500mm, the number has five, accounting for 3.77kg / m.
By weight calculated as: 3.5 × 5 × 3.77 = 66.0kg
2. Calculate the size of the note when Some
2.1 note indoor and outdoor, steel column bottom elevation values ​​are ± 0.00 or other elevation value. When calculating the length (or height) with elevation values, should be particularly careful not calculated according to ± 0.00.
2.2 About Variable H-section members (beams, columns) corresponding stiffening plate, purlin bracing height parapet fascia bracket (or length) calculations can mean beams, H-section column height is calculated on .
2.3 Roof purlin length, calculated according to a long pass, without deducting purlins gap between the Also note plus the length of the gable roof beams purlins share, for example, it is represented by the axis of the center line of the roof beams, then: purlin the axial length + length = roof beam width.
2.4 Calculation wall purlins should be noted that post, door beams, purlins whether Larry, Larry whether other parts of purlins.
2.5 The length of the lever, press the corresponding purlin spacing per side plus 50mm calculation, and the length of each rod were increased 100mm.
2.6 Calculation of water on the income side of the pan member
2.6.1 Calculate the range: pressure ridge top cover plate flashings and gutters and roof parapet at the interface, with a gable roof flashing plate interface, the upper part of the parapet flashing plate to close the corner of the wall side panels, doors and windows closed around the side panels, wall panels and wall panels in contact at the pan of water, walls and canopy water phase at pan plate, canopy around the income side plate. As for the double plate, then another calculation in the roof panel, the income side of the inner wall panels and other pieces at each interface.
2.6.2 width on the income side of the pan of water board: Under normal circumstances, the income side of the pan of water to expand the width of the member can be calculated as 300 ~ 400mm, capping parapet and roof cover to expand by 500 ~ 700mm width calculations. Actual calculation, the corresponding contacts detail according to design calculations.
2.7 variable cross-section beams webs, tender, subcontracting settlement, according to net weight calculation costing, press circumscribed rectangle calculation with Party billings. Various webs according circumscribed rectangle calculation.
3. The part can not be double-counted
3.1 high-strength bolts: connection between the crane girder and column between, two members share, a member can not be counted once.
3.2 Roof Support, tie bars between columns support: Some construction plans on between columns supporting the roof arrangement diagram showing a part of the support, and in the calculation of the roof support has been calculated, and it should not be calculated in such a case, we should support the roof and wall supports drawing up a control to see.
4. Other matters to be noted
4.1 calculate the proportion of profiles, and in particular, H-beam steel, must not forget to subtract the reduced thickness. For example, when calculating the proportion of steel, not when the bar shall be calculated by subtracting the inner diameter of the occupied area.
4.2 Check proportion of material on hardware manuals or other materials on, must be careful not to troubleshooting.
4.3 Calculation C purlin proportion can be calculated by the developed area.
4.4 skeleton hollow sunlight plate, aluminum plate and other decorative surfaces, etc., do not count leak.
4.5 All calculations are required to do careful, do not be careless, under normal circumstances, it should be checked twice a calculation. Should remember "the least bit lost in a thousand miles," this sentence. Low or go wrong calculation accuracy, the consequences will be very serious. Also, do not hesitate to ask to be reminded of Hainan steel, studious; often the first line of in-depth engineering, understand and are familiar with a variety of construction techniques and processes, a deeper impression, lay the foundation for a better job of pre-clearing work.