In construction work, accurate calculation of specifications for building steel is essential for cost control, structural design and construction arrangements. The following is a detailed description of how the specifications of common building steel are calculated:
Basic formula for theoretical weight
The theoretical weight of the steel is measured in kg (kg) and its basic formula is $w (weight,kg) = f (disconnected area, mm2) x l (long, m) x old (density, g/cm3) x 100 \frac {100}. However, due to permissible deviations in the manufacture of steel, the theoretical weight calculated in formulae differs from the actual weight and can only be used as a reference for estimation。
Common construction steel specifications calculation methods
1. Circle steel/disk
• formula for calculation of weight per metre: w=0. 006165 x d2w = 0. 006165 x d2w =0. 006165 x d2 (ddd in diameter, in mmmmmm)
• for example, round steel with a diameter of 100 mm 100 mm per metre by weight. For the formula d = 100d = 100d = 100 generation, w = 0. 006165 x 1002 = 61. 65 kgw = 0. 006165 x 1002 = 61. 65 kgw = 0. 006165 x 1002 = 61. 65 kg. If the weight of the whole steel is to be calculated, it is only necessary to multiply the weight per metre by the length of the steel in mmm。
Snail steel
• formula for calculation of weight per metre: w=0. 00617 ×d2w =0. 00617 ×d2w =0. 00617 ×d2 (ddd is a fracture diameter in mmmmmm)
• e. G. Calculations of screwd steel with 12 mm12 mm12 mm in diameter. D = 12d = 12d = 12-generation formula, w = 0. 00617 x 122 = 0. 888 kgw = 0. 00617 x 122 = 0. 888kw = 0. 00617 x 122 = 0. 888kg. The mass of the screwdriver is 0. 888 x l 0. 888 x l kg if llllm is known。
Steel plates
• weight formula: $w = 7. 85 x length (m) x width (m) x thickness (mm) $
• for example: a steel plate of 6m6m6m, 1. 51m1m1. 51m1. 51m, 9. 75mm9. 75mm9. 75mm thick with a weight of w=7. 85x6x1. 51x9. 75=693. 43kgw = 7. 85x6x1. 51x9. 75=693. 4kg。
4. Square steel
• weight formula: $w = border width (mm) x border width (mm) x length (m) x $0. 00785
• for example, the width of a square steel is 50 mm 50 mm and the length is 6 m6 m6 and its weight is w=50 x 50 x 6 x 0. 00785 = 117. 75 kw = 50 x 50 x 6 x 0. 00785 = 11775 kw = 50 x 50 x 6 x 0. 00785 = 117. 75 kw = 50 x 6 x 0. 00785 = 117. 75 kg。
5. Flat steel
• weight formula: $w = border width (mm) x thickness (mm) x length (m) x $0. 00785
• for example: flat steel border width 50 mm 50 mm 50 mm, thickness 5. 0 mm 5. 0 mm, length 6 m6m6 m, weight w=50 x 5 x 6 x 0. 00785 = 11. 775 kw = 50 x 5 x 6 x 0. 00785 = 11. 775 kgw = 50 x 5 x 6 x 0. 00785 = 50 x 5 x 6 x 0. 00785 = 11. 775 kg。
6. Hexagon steel
• weight formula: $w = border diameter (mm) x border diameter (mm) x length (m) x $0. 0068
• for example, hexagonal steel has a border diameter of 50 mm 50 mm 50 mm and a length of 6 m6 m, with a weight of w= 50 x 50 x 6 x 0. 0068 = 102 kgw = 50 x 50 x 6 x 0. 0068 = 102 kgw = 50 x 50 x 6 x 0. 0068 = 0. 0068 = 102 kg。
7. Steel pipe (sutureless pipe)
• weight formula: $w = (outside - wall thickness) x wall thickness (mm) x 0. 02466 x length (m) $
• for example: steel pipes with an outer diameter of 114 mm114 mm114 mm, wall thickness of 4 mm4 mm4 and length of 6 m6m, with a weight of $w = (114 - 4) x 4 x 0. 02466 x 6 = 65. 102 kg。
8. Quadrant steel
• weight calculation formula: w = border width x thickness x 0. 05 x length w = \\text {marine width} \\text × border thickness} ×0. 015 x length} w = border width x thickness x 0. 05 x length
• for example, the width of the side edge steel is 50 mm 50 mm 50 mm, the width of the side is 5 mm 5 mm 5 mm 6 m6 m, the length of the side is first unified unit 0. 05 m 0. 05 m 0. 05 m, the width of the side is 0. 005 m 0. 005 m 0. 005 m, the w = 0. 05 x 0. 005 x 0. 015 x 6 = 0. 0000225 kgw = 0. 05 x 0. 005 x 0. 05 x 6 = 0. 000225 kw = 0. 05 x 0. 005 x 0. 015 x 6 = 0. 0000225 kg (the coefficient in the formula here is an empirical coefficient and the actual calculation is made with regard to the accuracy of the unit conversion and coefficient)。
9. Man-word steel
• weight formula: w=0. 00785 x waist thick
High +f (legs wide - waist thick)
X length w = 0. 00785 x \text {little waist}
\text{high}+f (\text{legs wide} -\text{ waist thick} i'm not sure
X\text{longance}w=0. 00785x waist thick
High +f (legs wide - waist thick)
× length, where fff is a factor, which varies in value according to the type of craft steel, and can be found in the table of specifications of the craft steel。
• example: assuming known trade-word steel is thick, tall
