×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Where to find the complete geometry details of steel shapes?

Where to find the complete geometry details of steel shapes?

Where to find the complete geometry details of steel shapes?

(OP)
For example, a Channel steel shape: where I can find all geometric parameters defining the inner C of the C shape cross section, curves (radius) at the flange toe and web toe, slope of the flanges at the top and bottom inner C, etc.

The AISC SCM gives basic parameters about section geometry and sectional properties but does not give all the geometry details.

Googled online and found something like this:
http://www.structural-drafting-net-expert.com/stee...
http://firststeel.en.alibaba.com/product/202250181...
But did not find the needed info for US ASIC SCM shapes.

Thanks...

RE: Where to find the complete geometry details of steel shapes?

Actually, that's a good question. I went out to the stairwell of my office once to measure the channel stair stringers for just this reason.
I usually just fake it based on the info given.

RE: Where to find the complete geometry details of steel shapes?

If I understand what you're looking for, those dimensions can vary from mill to mill. This AISC article link about W-shapes might help.

RE: Where to find the complete geometry details of steel shapes?

Off the top of my head, some of that information is provided along with the mill tolerances in the ASTM A6 specification.

But agreed with Buggar, usually I just fake (or approximate, if you prefer) it based on what is known.

RE: Where to find the complete geometry details of steel shapes?

(OP)
Thanks to all for your input. ASTM A6 and the article flight7 provides both give useful information about my question.
ASTM A6/A6M Section gives "tolerances define the acceptable limits of variation from theoretical dimension for the cross-sectional area, flatness, straightness, camber and sweep for rolled sections."

Article "Changes to T, k and k1 Dimensions for W-Shapes" says "Steel producers determine the size of the fillet radius used between the web and flange of W shapes based upon individual mill rolling and straightening practices. These practices and the fillet radii chosen depend upon the equipment used in the various mills,among other parameters. Since equipment and practices vary between mills, the radii also vary as recognized in ASTM A6/A6M paragraph 13.3.1, which states that “radii of fillets and toes of shape profiles vary with individual manufacturers and therefore are not specified.”

For W shape, it is reasonable and acceptable that "radii of fillets and toes of shape profiles vary with individual manufacturers and therefore are not specified.” once k, k1 and T are given coz varied radii of fillets and toes of W would not change the shape significantly.

For C shape, however, there is no T dimension as W shape does, R1 and R2 are dependent and correlated though the slope of the top and bottom lines of the inner C. The shapes by different producer would have significant difference if R1 and R2 "vary with individual manufacturers and therefore are not specified". So, where are the theoretical/guiding values for the camber and sweep for C, etc.?

Thanks for your attention.

RE: Where to find the complete geometry details of steel shapes?

Why do you want to "pollute" (crowd up and complicate) your drawings and calculations with such details?

Your time is more valuable than checking more important features of the steel joints and weld copes and weld designs. In the shop of field, they will be cut, sawed, or burned; not CAD-CAM machined to near 1/100 inch accuracy following a curved cope of another beam. Satellites or rocket fuel tanks only 2 millimeters thick - where ounces matter? Sure. That's why NASA can't build cheap and economical buildings.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources