DETAILING STANDARDS
________ Regional QC Manager, Decatur Facility Turner Industries Group, L.L.C.
Date 8/30/2010
Specifications
Detailing Standards
Rev 0 Page 2 of 9 Date: 8/30/2010
Revision Record Revision
Date
DESCRIPITION
BY
Rev 0
8/30/2010
Initial Release
RR
Specifications
Detailing Standards
1.0
Rev 0 Page 3 of 9 Date: 8/30/2010
Purpose To 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
for
The Project/Shop Manager, Project Engineer and/or Detailers are responsible 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 drawing size based on a 4.2 Customary scales are
Paper and Drawing sizes Drawings shall be made on 24” X 36” paper and a 21” X 33 ½” + will be used for structural drawings. Reduced set drawings will be 50% reduction. Scales Drawing scales shall be in accordance with the following table. US drawing scales are expressed in inches to feet ratios. Metric drawing expressed in non-dimensional ratios.
US Customary Scale
Close Metric Scale
Specifications
Detailing Standards
4.3
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
Units
Rev 0 Page 4 of 9 Date: 8/30/2010
Specifications
Detailing Standards
Rev 0 Page 5 of 9 Date: 8/30/2010
requirements
Drawings will contain US Customary units only unless Project specify otherwise.
.
Writing Conventions
4.4 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 importance 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°.
Specifications
Detailing Standards
4.4.9
Rev 0 Page 6 of 9 Date: 8/30/2010
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, Symbols for Welding, Brazing and Nondestructive Examination.
Standard 4.7
Tolerances Shop and erection tolerances shall be in accordance with the AISC Standards Practice. Fabrication tolerances for weld reinforcement shall accordance with AWS D1.1, Structural Welding Code – Steel.
Code of be in
4.8
Structural Steel
Specifications
Detailing Standards
Rev 0 Page 7 of 9 Date: 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
1¼
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
4.10
Material Identification and Piece Marking
Specifications
Detailing Standards
Rev 0 Page 8 of 9 Date: 8/30/2010
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 the Project Specifications and the Turner Industries Group, L.L.C – Facility’s “Material Preparation and Coatings Application Procedure”.
with Decatur 4.12
Shipping Sequences The designation of shipping sequences shall be in accordance with the Specifications.
Project 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
Specifications
Detailing Standards
Rev 0 Page 9 of 9 Date: 8/30/2010
