10/29/2022 0 Comments Welding of hss squareNote that cold bending may be used to provide sweep in members to practically any radius desired. "A minimum length of 25 ft is commonly practical due to manufacturing/fabrication equipment." Deeper members may require a larger minimum radius."Ģ. is between 10 and 14 times the depth of the member. "The minimum radius for camber induced by cold-bending in members up to a nominal depth of 30 in. Guidelines for bending plates are found in ASTM A6/A6M-Appendix X4.Ĭold-bending guidelines for shapes are also found in the AISC Manual, Part 2 Section:ġ. Though similar limits would apply to any bent product, such deformations are not generally achievable in HSS. AISC does limit the radius of bend for bent plates to prevent cracking during the bending process. Limits on radii of curved shapes are essentially a function of the capabilities of the bender. Also, ASTM A53/A53M specifically allows dents with depths up to the lesser of 10% of the pipe diameter or ¼ in. For example, ASTM A53/A53M requires only that the pipe be reasonably straight, where ASTM A500/A500M places a specific tolerance on straightness. The tolerances on ASTM A500/A500M HSS also tend to be tighter than those on A53. Additionally, ASTM A500/A500M HSS can be obtained in many more sizes with periphery not exceeding 88 in. For example, an HSS 6.625×0.280 has the same dimensional properties as a Pipe 6 Std. Round HSS are usually ASTM A500/A500M Grade C (Fy= 50 ksi). They are available in cross sections matching each of the cross sections for ASTM A53/A53M Grade B steel pipe. Pipes with wall thicknesses that do not correspond to the foregoing weight classes are designated by the term Pipe, outside diameter (in.) and wall thickness (in.), with both expressed to three decimal places. wall thickness, which corresponds to the standard weight series. Pipes up to and including NPS 12 are designated by the term Pipe, nominal diameter (in.) and weight class (Std., xStrong, xx-Strong). Steel pipe is made to requirements in ASTM A53/A53M Grade B (Fy= 35 ksi). If you have additional questions or just want to talk with one of the AISC Steel Solutions Center advisors about HSS, please contact the AISC Steel Solutions Center at 1-866-ASK-AISC or HSS are intended to be used as structural members. Pipe, though sometimes used as structural members, is intended to be used for mechanical and pressure applications. As used in the AISC Steel Construction Manual, steel pipe and round HSS are manufactured to meet different ASTM standards. Many of the questions that arise relative to the design, specification, detailing and fabrication of HSS are addressed in the following resources. A quick comparison between A500 and A1085 can be found in the summary flyer. The new specification provides improved performance that makes HSS design easier and potentially more effective for the client. In 2013 a new ASTM specification for HSS was released, ASTM A1085. Popular uses include architecturally exposed structural steel, staggered truss and conventional truss structures, and basic column or vertical bracing elements. The use of HSS is growing with popularity all around the world in the building industry and in the United States accounts for approximately 18% of the structural steel market. In the United States, HSS sections conform to either the ASTM Specification A500 or A1085. Hollow Structural Sections (HSS) are manufactured hollow steel sections, typically of circular, rectangular, or square cross-section.
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