How to determine the specifications of channel steel

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The specifications of channel steel mainly use dimensions such as height (h), leg width (b), waist thickness (d), etc
At the same height, lightweight channel steel has narrower legs, thinner waist, and lighter weight than regular channel steel. 18-40 are large channel steels, while 5-16 are medium channel steels. Imported channel steel shall be marked with actual specifications, dimensions, and relevant standards. The import and export ordering of channel steel is generally based on the specifications required during use after determining the corresponding carbon bonded steel (or low alloy steel) steel grade. Except for the specification number, channel steel does not have a specific composition or performance series.
The delivery length of channel steel can be divided into two types: fixed length and double length, and the tolerance value shall be specified in the corresponding standards. The length selection range of domestic channel steel is divided into three types based on different specifications: 5-12m, 5-19m, and 6-19m. The length selection range of imported channel steel is generally 6-15m.

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