×
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

Metal Deck

Metal Deck

Metal Deck

(OP)
Does anyone have suggestions on design references for calculating the allowable concentrated loads for non composite metal decks? I checked out the SDI website and only found a design guide for composite decks.

Thanks in advance

RE: Metal Deck

Is this metal deck alone or a metal deck with concrete?

RE: Metal Deck

(OP)
The deck is not covered with concrete.

I guess the concentrated load capacity would depend on the
distribution mechanics of the load (i.e plank, rail, wheel), as well as the load location (on top of rib, or in the valley).

Is the general approach to supply another structural member (flat channel or angle) that can span between supports and
just ignore the deck?



 

RE: Metal Deck

Yes. As soon it exceeds the weight of a man, say 100 kgf, it is better to provide specific support. However, heavy decks may deal with heavier point loads so engineering judgement must prevail. On the other hand, if you pinpoint everything causing point loads with spearate substructures, you can employ a deck more adjusted to the distributed loads, this can lead to less cost, especially when a single thickness is preferred for the deck.

RE: Metal Deck

Some suppliers have 'design assumptions' in their tables that might include a nominal point load.  I would check there first.  If the load is for a RTU I typically never rely on the deck for concentrated loading, unless I calculate the RTU to be of negligible weight or size and not affect the snow loading.  

You might frame below the decking to accommodate the weight of the unit and also reinforce the opening in the roof if there is one. Typically this is accomplished with angles or channels between joists/beams.

Or you could frame a 'base' above the roof as you mentioned.  Typically, if your metal deck rests on OWSJ's you would design a base to span accross 2 or more joists (Depending on the load, etc).  Just make sure the joist supplier knows your intentions!  

RE: Metal Deck

(OP)
Thanks JAE....that is what I was looking for.

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