×
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

Roof sheeting

Roof sheeting

Roof sheeting

(OP)
what are the pros and cons of standing seam and clip seal profiled roof sheeting products against through fix systems? I understand that there are lightening protection requirements that mean a 0.5mm sheet must be used otherwise a system of tapes must be provided which would require through fixing, thereby negating some of the adavntage of a standing seam system.

RE: Roof sheeting

I believe that some standing seam roof systems don't provide lateral restraint to the purlins (unless there is an adequately fixed liner sheet).

You can get over this by discussion with Technical Department of the purlin manufacturer you propose to use, and usually requires additional bracings and diagonal tie wires be provided.

I have used the CORUS KALZIP system, and this has minimum flange widths for purlins also, which is sometimes greater than that required for structural purposes.

RE: Roof sheeting

Water resistance and longevity of such is the primary reason for going with standing seam systems vs. exposed fasteners. As Valleyboy noted, the lateral restraint can also be different in different systems.

The gasketing washers used in exposed fastener systems harden with time and allow water intrusion.   

RE: Roof sheeting

(OP)
Thanks for the info valleyboy and Ron. I believe the pitch of the roof is of course an important factor in the choice of fixing method. Any comments re. lightning protection?

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