Metal structures - heading

Design Input

Column spacing in longitudinal direction - 20 m

Column spacing in transverse direction - 5 m

Floor top elevation - 9.6 m

Building floor height - 2.4 m

The live uniform distributed load (useful) Rn - 26 kN/sq.m

Construction district (city) - Lenexpo Exhibition Complex

The thermal mode in which the work site is located is heated.

In accordance with the construction conditions we accept steel C 255

Design resistance of steel to compression, tension and bending, assigned by yield strength Ry and selected according to Annex A [3]:

- design resistance of steel C255 for floor beam Ry = 240 MPa (24 kN/cm2);

- design resistance of steel C255 for auxiliary beam Ry = 240 MPa (24 kN/cm2);

- design resistance of steel C255 for main beam Ry = 240 MPa (24 kN/cm2);

The coefficient of the operating conditions of the structure and their elements αc is determined according to Table 6 [3]. For continuous beams of the working platforms during their calculations for strength and local stability of individual elements, the value αc = 1.

As per Table 63, Annex 3 [3] we find the characteristics of steel:

- modulus of elasticity E = 206000 MPa (20600 kN/cm2);

- Poisson coefficient v = 0.3;

- steel density p = 7850 kg/m3.

The load safety factor [theta] f for the weight of building structures is determined in accordance with section 2 [4]. For metal structures, regardless of their design features, the value of [theta] f = 1.05. Reliability factors for temporary evenly distributed loads are accepted in accordance with the recommendations of section 3 [4]. At full standard value of loads of 2 kPa and more, value αf = 1.2.

Ф.bak.frw