Attachment of fixed roof access ladder to masonry cavity wall
Attachment of fixed roof access ladder to masonry cavity wall
(OP)
Any recommendations on how to attach a roof access ladder to the exterior cavity wall of a building (one story)? In particular, the wall is constructed of 4" split face cmu veneer, with an 8" cmu backup wall. I am debating use of epoxy adhesive anchors in just the 4" exterior veneer, run long with a backup nut to hold the plates off the split face surface. OR run an epoxy anchored threaded rod all the way thru both the veneer and the backup wall? Suggestions?






RE: Attachment of fixed roof access ladder to masonry cavity wall
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Attachment of fixed roof access ladder to masonry cavity wall
When I am working on a problem, I never think about beauty but when I have finished, if the solution is not beautiful, I know it is wrong.
-R. Buckminster Fuller
RE: Attachment of fixed roof access ladder to masonry cavity wall
With the injection of the resin, the resin forms "mushroom" heads in the cavity and into the block wall as well. This would tie in the two wythes at the connection.
HILTI HIT HY70 link
I think they have specialty tubes that go longer as well - you'd have to call a rep to find out.
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RE: Attachment of fixed roof access ladder to masonry cavity wall
RE: Attachment of fixed roof access ladder to masonry cavity wall
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RE: Attachment of fixed roof access ladder to masonry cavity wall
RE: Attachment of fixed roof access ladder to masonry cavity wall
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Attachment of fixed roof access ladder to masonry cavity wall
RE: Attachment of fixed roof access ladder to masonry cavity wall
RE: Attachment of fixed roof access ladder to masonry cavity wall
Hopefully, the attached sketch will help clarify what I so inelegantly put into narrative above.
Dave
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RE: Attachment of fixed roof access ladder to masonry cavity wall
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RE: Attachment of fixed roof access ladder to masonry cavity wall
The install would require the removal and reinstating of some of the veneer to access the bolts between wythes though, right?
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Attachment of fixed roof access ladder to masonry cavity wall
This was developed mostly for new walls, though we have used it for modifications on existing walls. Anything the steel people do, regardless of the detail, almost always ends up needing some attention from the masons anyway. This at least makes the masonry repairs modular, so the reinstalled blocks (or brick, or stone, or whatever) go back in whole pieces, and they look less affected. Fortunately, most ladders go on the less desirable side of most buildings anyway!
Dave
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RE: Attachment of fixed roof access ladder to masonry cavity wall
You have at least four of these on every ladder, and sometimes six or eight, depending on the ladder length. I've climbed on these details before, and I'm 6'-2, 210#. I couldn't make them budge an inch. If there's any wiggle in them, I couldn't squeeze it out of them.
Dave
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