HSSHollow Structural Sections - Independence Tube

1 HSSH ollow Structural SectionsHSS:TECHNICAL BROCHURE 2013 Steel Tube Institute2516 Waukegan Road, Suite 172 Glenview, IL 60025 T E L : 8 47. 4 01FA X : 8 47. 6 6 0 . 7 9 81 LRFD COLUMN LOAD TABLES2 The transformation of steel strip into hollow Structural Sections (HSS) is the result of a series of operations including forming, welding and sizing. Currently three methods are being used in North America for the manufacture of HSS. These methods are described below. Each method meets ASTM A-500 and CSA requirements for the the manufacture of HSS, and the sizes listed in this brochure may be produced to either Resistance Welding (ERW) Process In the tube mill, flat steel strip (1) is formed continuously around its longitudinal axis to produce a round tube.

2 This is done by moving the strip through a progressive set of rolls (2-6). The strip edges (7) are heated by either high frequency induction or contact welding and then forged together by weld rolls to create a continuous longitudinal weld without the addition of filler metal. The weld seam (8) is then cooled and processed through a set of sizing shaping rolls which cold-form it into a round (9), square (10) or rectangular (11) Weld-Square (ERW) ProcessIn the tube mill, flat steel strip (1) is formed continuously around its longitudinal axis to produce a round tube.

3 This is done by moving the strip through a progressive set of rolls (2-6). The strip edges (7) are heated by either high frequency induction or contact welding and then forged together by weld rolls to create a continuous longitudinal weld without the addition of filler metal. The weld seam (8) is then cooled and processed through a set of sizing shaping rolls which cold-form it into a round (9), square (10) or rectangular (11) Arc Weld (SAW) ProcessIn the tube mill, flat steel strip (1) is formed continuously around its longitudinal axis to produce a round tube.

4 This is done by moving the strip through a progressive set of rolls (2-6). The strip edges (7) are heated by either high frequency induction or contact welding and then forged together by weld rolls to create a continuous longitudinal weld without the addition of filler metal. The weld seam (8) is then cooled and processed through a set of sizing shaping rolls which cold-form it into a round (9), square (10) or rectangular (11) Manufacturing Methods3 Load and Resistance Factor Design (LRFD) column load tables are presented for square, rectangular and round hollow Structural Sections (HSS) manufactured by the electric resistance welding (ERW ) method and for square, and rectangular HSS manufactured by the submerged arc welding (SAW ) method.

5 Tables of design stresses for compression members for six minimum specified yield stress steels from Fy = 42 ksi to Fy = 70 ksi are also tabulated design strength loads and the compression member design stresses have been calculated in accordance with the AISC 2010 Specification for Structural Steel Revised section property data for HSS is published in hollow Structural Sections - Dimensions and section Properties available from the Steel Tube Institute of North for square and rectangular HSS are presented for Fy = 46 ksi and for Fy = 50 ksi.

6 Separate tables are used for HSS sizes produced by the ERW and SAW manufacturing for round HSS are presented for Fy = 42 ksi, Fy = 46 ksi and for Fy = 50 ksi. The round HSS are produced by the ERW manufacturing design strength loads have been calculated for effective lengths, KL, with respect to the least radius of gyration, r or ry, varying from 0 to 40 feet. A HSS defined as a slender element cross section , in accordance with Table of the AISC 2010 Specification for Structural Steel Buildings.

7 , is identified in the tables with an asterisk (*) immediately following the design wall thickness parameter in the tabulated values of compression member design stresses are calculated in accordance with the requirements of AISC Chapter E of the AISC 2010 Specification Note that these design stresses do not apply to a HSS defined as a slender element cross section .Refer to part 4, Design of Compression Members, of the AISC 14th Edition Steel Construction Manual for a discussion of the design strength of columns.

8 The symbols in these tables follow those used in the AISC Manual .ForewordTITLE IF NECESSARYNote: The information presented in this publication has been prepared in accordance with recognized engineering principles and is for general information only. While it is believed to be accurate, this information should not be used or relied upon for any specific application without competent professional examination and verification of its accuracy, suitability, and applicability by a licensed professional engineer, designer, or architect.

9 The publication of the material contained herein is not intended as a representation or warranty on the part of The Steel Tube Institute of North America or of any other person named herein, that this information is suitable for any general or particular use or of freedom from infringement of any patent or patents. Anyone making use of this information assumes all liability arising from such must be exercised when relying upon other specifications and codes developed by other bodies and incorporated by reference herein since such material may be modified or amended from time to time subsequent to the printing of this edition.

10 The Institute bears no responsibility for such material other than to refer to it and incorporate it by reference at the time of the initial publication of this How to Use the Column Load TablesTable of Contents5 Design Stress Tables Square HSS (ERW) Fy = 46 ksi6 Square HSS (ERW) Fy = 50 ksi10 Round HSS (ERW) Fy = 42 ksi22 Round HSS (ERW) Fy = 46 ksi34 Round HSS (ERW) Fy = 50 ksi46 Rectangular HSS (ERW) Fy = 46 ksi58 Rectangular HSS (ERW) Fy = 50 ksi82 Square HSS (SAW) Fy = 46 ksi108 Square HSS (SAW) Fy = 50 ksi110 Rectangular HSS (SAW) Fy = 46 ksi 112 Rectangular HSS (SAW) Fy = 50 ksi 115 Column Load Tables Fy = 42 ksi118 Fy = 46 ksi119 Fy = 50 ksi120 Fy = 60 ksi121 Fy = 65 ksi122 Fy = 70 ksi1235 Example 1:Design the lightest 6-inch square ERW HSS column of Fy = 46 ksi (ASTM A500 Gr.)