Embed Size (px)
DESCRIPTION
This is a structural steel detailing procedure that was written for AISC certification.
Citation preview
DETAILING STANDARDS
________ Date 8/30/2010 Regional QC Manager, Decatur Facility Turner Industries Group, L.L.C.
Detailing Standards
Specifications
Rev 0Page 2 of 9Date: 8/30/2010
Revision Record
Revision Date DESCRIPITION BY
Rev 0 8/30/2010 Initial Release RR
Detailing Standards
Specifications
Rev 0Page 3 of 9Date: 8/30/2010
1.0 PurposeTo establish a procedure to outline the detailing standards as they apply to structural steel projects detailed for Turner Industries Group, L.L.C. – Decatur facility.
Currently all detailing is outsourced.
2.0 Scope
This procedure will describe the detailing technical preferences and requirements customarily used in the Turner Industries Group, L.L.C. – Decatur facility. The Detailing Standards will also show any special information required on drawings such as allowances for cuts, camber and any supplementary requirements or necessary special instructions.
3.0 Responsibilities
The Project/Shop Manager, Project Engineer and/or Detailers are responsible for adherence to this procedure.
4.0 Procedure
Structural detail drawings shall be drawn in accordance with the AISC “Detailing for Steel Construction” manual and the following general requirements unless Project requirements specify otherwise.
4.1 Paper and Drawing sizes
Drawings shall be made on 24” X 36” paper and a 21” X 33 ½” + drawing size will be used for structural drawings. Reduced set drawings will be based on a 50% reduction.
4.2 Scales
Drawing scales shall be in accordance with the following table. US Customary drawing scales are expressed in inches to feet ratios. Metric drawing scales
are expressed in non-dimensional ratios.
US Customary Scale Close Metric Scale
Detailing Standards
Specifications
Rev 0Page 4 of 9Date: 8/30/2010
1’ = 1’ – 0” (Full Size) 1:1 (Full Size)
6” = 1’ – 0” (Half Size) 1:2 (Half Size)
3” = 1” – 0” 1:4
1 ½” = 1’ – 0” 1:8
1” = 1’ – 0” 1:10
3/4” = 1’ – 0” 1:20
1/2” = 1’ – 0” 1:25
3/8” = 1’ – 0” 1:30
1/4” = 1’ – 0” 1:50
3/16” = 1’ – 0” 1:80
1/8” = 1’ – 0” 1:100
3/32” = 1’ – 0” 1:125
1/16” = 1’ – 0” 1:200
1” = 10’ 1:100
1” = 20’ 1:250
1” = 30’ 1:400
1” = 40’ 1:500
1” = 50’ 1:600
1” = 80’ 1:1000
1” = 100’ 1:1200
1” = 200’ 1:2000
1” = 250’ 1:3000
1” = 400’ 1:5000
1” = 500’ 1:6000
1” – 1000’ 1: 10000
Detailing Standards
Specifications
Rev 0Page 5 of 9Date: 8/30/2010
4.3 Units
Drawings will contain US Customary units only unless Project requirements specify otherwise.
. 4.4 Writing Conventions
4.4.1 On manually prepared shop drawings, shipping pieces may
be duplicated on one sketch when the differences are minor and the sketch does not become complicated by notes.
4.4.2 Lettering should be neat and legible. Notes should not run into the sketch or the associated dimensioning. Preferably, general notes should be placed near the title block. Small letters should be about 3/32 in. high and numbers about 5/32 in. high. The size and boldness of the letters should be in proportion to the impor-tance of the information.
4.4.3 Lettering should be horizontal, vertical or parallel to a sloping member such that it can be read from the bottom or right side of the drawing.
4.4.4 Special notes should be provided to convey all detail instructions that are not shown readily by dimensions, sketches, detailing standards or billing. Information explained by adding one or more views or sections to a sketch will be more valuable to the shop than a sketch with many notes.
4.4.5 In all detailing use good line contrast—lighter lines for dimension lines and bolder lines for the object lines.
4.4.6 Dimension lines should be placed far enough from the sketch to allow sufficient room for dimensions. Generally, the first dimension line should be approximately 5/8 in. from the sketch and each succeeding line separated by about 3/8 in. All dimensions up to a foot are given in inches, thus: 11 15/16”. All dimensions of a foot or over are given in feet and in., thus: 1 '-0 or 1 '-2 1/2. The point of the arrowhead on a dimension line should touch the extension line and not go past it. Care must be taken in dimensioning so as to avoid possible misinterpretation.
4.4.7 Sections should be taken looking to the left and looking toward the bottom of the drawing.
4.4.8 Section views shall be oriented to retain the position indicated by the cutting plane, not rotated through 90°.
Detailing Standards
Specifications
Rev 0Page 6 of 9Date: 8/30/2010
4.4.9 Never cross-hatch elements of sectional views. Anchor rods, base plates and setting plates, grillages and embedded items should be the first pieces detailed. Avoid one-hole structural connections, except when connecting rod bracing.
4.4.10 Re-entrant cuts, such as for beam copes and in bottom-chord gusset plates at columns, should be drawn with the radius clearly
shown. (See Figure A1-2)
4.4.11 On each shop drawing, list the erection drawings where the members detailed on that particular shop drawing will be located.
4.4.12 Lengths of main members are not required to be drawn to scale.
4.4.13 Ends/edges to be finished must be marked "Fin" in accordance with the practice of the fabricator. Angles and channel flanges should have gages detailed from the backs of their legs and webs, respectively.
4.4.14 Detail channels and angles looking at their backs.
4.4.15 The drawing title block and notes shall be as shown in Figure A1-2 unless otherwise defined in the Project Specifications.
4.4.16 Detailing of holes, fasteners, washers, cuts and copes shall be in accordance with the AISC “Detailing for Steel Construction”.
4.5 Abbreviations
Abbreviations shall be in accordance with industry standards.
4.6 Welding Symbols
All welding and NDE symbols shall be in accordance with AWS A2.4, Standard Symbols for Welding, Brazing and Nondestructive Examination.
4.7 Tolerances
Shop and erection tolerances shall be in accordance with the AISC Code of Standards Practice. Fabrication tolerances for weld reinforcement shall be in accordance with AWS D1.1, Structural Welding Code – Steel.
4.8 Structural Steel
Detailing Standards
Specifications
Rev 0Page 7 of 9Date: 8/30/2010
Structural member sizes will conform to ASTM Specifications A6. The selection of connection geometry and materials shall be as required in the Project Specifications.
4.9 Bolts and Bolted Connections
Bolt type, bolted connections, placement lists and the bolt installation
method shall conform to the requirements in RCSC– Research Council on
Structural Connections – Specification for Structural Joints Using
ASTM A325 or A490 Bolts, AISC Steel Construction Manual and the
following Table.
Standard Bolt and Hole – U.S. Customary Units Conversion
AISC (ASTM A325/A490) ISO/TC167 (ASTM A325M/A490M)
Bolt Diameter Hole Bolt Diameter Hole Bolt Diameter Hole
inches Inches mm “soft” mm “soft” Mm “hard” Mm “hard”
½ 9/16 12.7 14.3 -- --
5/8 11/16 15.9 17.5 M16 18
¾ 13/16 19.0 20.6 M20 22
7/8 15/16 22.2 23.8 M22 24
1 1 1/16 25.4 27.0 M24 26
1 1/8 1 3/16 28.6 30.2 M27 30
1 ¼ 1 5/16 31.8 33.3 M30 33
1 3/8 1 7/16 34.9 36.5 -- --
1 1/2 1 9/16 38.1 39.7 M36 39
Detailing Standards
Specifications
Rev 0Page 8 of 9Date: 8/30/2010
4.10 Material Identification and Piece Marking
Each piece of detail material shall carry an assembly mark for identification and cross referencing. The material identification and piece marking convention shall be per the default used in the “SDS/2 Detailing System” software unless otherwise defined in the Project Specifications.
4.11 Paintings and Coatings
The application of painting and coatings shall be specified in accordance with the Project Specifications and the Turner Industries Group, L.L.C – Decatur Facility’s “Material Preparation and Coatings Application Procedure”.
4.12 Shipping Sequences
The designation of shipping sequences shall be in accordance with the Project Specifications.
5.0 References
AISC Detailing for Steel Construction, Chapter 4, latest edition
AISC Steel Construction Manual, latest Edition
ASTM A6 - Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
AWS A2.4, Standard Symbols for Welding, Brazing and Nondestructive Examination
AWS D1.1, Structural Welding Code – Steel
RCSC – Research Council on Structural Connections – Specification for
Structural Joints Using ASTM A325 or A490 Bolts
Turner Industries Group, L.L.C – Decatur Facility’s “Material Preparation
and Coatings Application Procedure”.
Project Specifications
Detailing Standards
Specifications
Rev 0Page 9 of 9Date: 8/30/2010
