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

Sealing Metal Roof Openings for Cables

Sealing Metal Roof Openings for Cables

Sealing Metal Roof Openings for Cables

Hi everyone

I am tasked to deal with sealing openings in metal roof of one of the cement plant structures( belt conveyor). There is a bunch of loose sizable cables running in a cable tray and through single skin corrugated metal roof sheet ( no insulation just the metal sheet). How will I seal the space around the cables? It has to be water tight as water cannot leaked through and mix with cement being transported in the structure. Anybody has a detail for this kind of thing???


RE: Sealing Metal Roof Openings for Cables

You likely need to enclose the cable tray to provide a waterproof enclosure and flash to the enclosed tray.


RE: Sealing Metal Roof Openings for Cables

I mean , the space all around the cables in the tray. Do i use some kind of foam or caulk??

RE: Sealing Metal Roof Openings for Cables

By having the tray enclosed, you can add or remove cables as required, or construct a small 'doghouse'. Talk to one of the tray manufacturers... done it often. You may have to have a 'gooseneck' (or whatever it's called) leading to the penetration to keep water out.


RE: Sealing Metal Roof Openings for Cables

Thank you!

RE: Sealing Metal Roof Openings for Cables

The Original Poster (OP) has not provided a sketch or dwg, but I think you missed the point above.

You've (properly!) addressed water-sealing the cables coming out of the cable tray, but that's not his real problem.
He has a cement dust conveyor enclosure, and has cables going through the roof od the dust enclosure. So he needs to seal the individual cables going through the roof AFTER they come out of the cable tray. Not the individual or grouped cables coming out of the cable tray.

And, if those roof connections stay dry (keep water out of the enclosure envelope) the cable tray problem is avoided as well.

Now, I don't have a solution to the roof penetration problem, but I think that is what needs to be addressed.

RE: Sealing Metal Roof Openings for Cables

racookpe... you need an enclosed tray, or you need to construct a small 'doghouse' to effect a waterproof penetration (or relatively waterproof). It's about the only way to effect a seal through the deck.


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! Already a Member? Login


Research Report - How Engineers are Using Remote Access
Remote access enables engineers to work from anywhere provided they have an internet connection. We surveyed our audience of engineers, designers and product managers to learn how they use remote access within their organizations. We wanted to know which industries have adopted remote access, which software they are using, and what features matter most. Download Now
eBook - Managing the Context of Product Complexity Using the Digital Twin
Keeping track of changes to complex products is difficult—think Aerospace & Defense equipment, new generations of commercial aircraft, and software-based automobiles. A new way to managing the digital context of the physical product is required and the answer is the Digital Twin. This ebook explores the opportunity available for Operations and Maintenance for the Digital Twin. Download Now
White Paper - Trends in Industrial Filtration
Substantial progress has been made in filtration technologies in recent years. New filter media materials, designs and processes have led to filters that are more efficient, reliable, compact and longer lasting. This white paper will discuss the various trends that are impacting operational responsibilities of MROs today and the resources that are available for staying up-to-date on the latest filtration solutions. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close