×
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

Hangers/connections Schedule

Hangers/connections Schedule

Hangers/connections Schedule

(OP)
How do you guys usually do your connection schedule for your wood framing?  Do you specify what kind of nails to use use with the simpson hanger?  Or do you rely on the contractor to read Simpson catalog?  What if you fasten it to a nailer or concrete instead?

RE: Hangers/connections Schedule

I believe our office uses a schedule that contains all the information needed.  Notice that some connectors have options for what size nails and how many.  You don't want that left up to someone else.  The best idea is to put everything on the plans or in your schedule that needs to be there in order to get the thing installed correctly.

There are connectors made for fastening to concrete.  Don't just drill out the holes in something that isn't designed for tapcons.  Not sure if that's is your last question or not.

RE: Hangers/connections Schedule

(OP)
I am specifying to use some face mount hangers with
titen screws directly to the concrete.  We usually only specify the connection type but I think I will start putting the fastener also.

RE: Hangers/connections Schedule

COEngineer,

Great question.  Here are my thoughts on that issue.  Generally, I only schedule hurricane clips based upon uplift forces. I recommend you schedule the appropriate nails by designating diameter and length (ex:  0.131" x 3") By the way, the penney weight designation will soon be a thing of the past.  Common, sinkers, box, pneumatic, etc. have variant lengths or more importantly variant diameters.  Simpson and USP do carry a 10d 1.5" nail used for joist hangers.  These are often used in beam hangers!  OOPS.  There are huge reductions for using these incorrect nails.  For your own protection and more importantly, the safety of the public, be very specific in specifying the nails.

Another issue in scheduling hangers based upon reactions only can be shown by the following example.  Suppose you have a 3 ply 14" LVL carrying either joists/rafters/ or common trusses.  And suppose these members are framed flush to the bottom of the beam.  Based on reactions, your schedule shows a relatively small, economical hanger works for the loading.  The problem here which is often missed is that all the nails are loading the beam below its neutral axis.  This may lead to a cross-grain tension failure.

I designate all beam to beam connections, including nailing on the engineering drawings.

woodengineer

RE: Hangers/connections Schedule

I agree with UCfSE and woddengineer.  I see too many of those damn 10d x 1 1/2" used for most hangers.  For your protection you must note the fasteners.

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