What is the allowable stress for 40B I-beam?
40A I-beam allowable stress [Sigma]=145*1.3=188.5MPaI-beam is mainly divided into ordinary I-beam, light I-beam and H steel three.
H type I-beam is also called wide flange I-beam, HW, HM, HN originated from European standards, HEB is the German standard of I-beam, of which HW, HN I-beam has been widely used in our country and production. HEA HEB HEM will be seen on many German designs and is hard to buy on the domestic market. In the domestic steel structure engineering, if the quantity is few, then may use the specification steel plate to carry on the welding splicing. In the case of large quantities, it is usually considered to use mechanical properties comparable to those of HW and HN steel.HW is mainly used for steel reinforced concrete frame column steel column, also known as rigid steel column; in steel structure is mainly used for the columnHM steel height and flange width ratio of about 1.33~~1.75, mainly in the steel structure used as steel frame column, in the frame structure under dynamic load frame frame, for example: equipment platformHN steel height and flange width ratio greater than or equal to 2; used mainly for beams
Ordinary I-beam, light I-beam flange is variable cross-section, by web plate thickness, external thin; H steel: HW, HM, HN, HEA, HEB, HEM and so onOrdinary I-beam, lightweight I-beam has formed the national standard, the common 10# I-beam is equivalent to the Internet I100 (such as 10# also channel equivalent channel (U100) for the implementation of the standards of different countries, which have subtle differences in their specifications)
