×
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

Through Flashing Single Wythe Masonry

Through Flashing Single Wythe Masonry

Through Flashing Single Wythe Masonry

(OP)
NCMA has details for through wall flashing of for standard reinforced 8 inch cmu. This interrupts the bond of the mortar and grout at the base of the wall. The only transfer for the shear loads at the base of the wall is through the masonry dowels. Some locations are requiring through wall flashing for structural reinforced cmu walls. Just curious about opinions on using through wall flashing.

RE: Through Flashing Single Wythe Masonry

An obvious thought of an Architect to solve a perceived problem, real or not, without consulting a Structural Engineer...  Happens too much in my humble opinion.  

Do the sections at the base of the wall show the dowels afterset into the foundation through pre-drilled holes in the flashing?  This could be a problem if you had to develop a moment at the base of the wall - special consideration here...

Seems you are creating a condition for horizontal cracking and water intrusion with the presence of the thru-flashing - exactly what you are trying to prevent.  Structurally, it does not seem to be a good idea and I would not do it.

Mike McCann
MMC Engineering
Motto:  KISS
Motivation:  Don't ask

RE: Through Flashing Single Wythe Masonry

Through-wall flashing is not necessary for single wythe masonry.  It is necessary for multi-wythe and veneer applications.

RE: Through Flashing Single Wythe Masonry

If you set the bottom of the CMU wall down below the floor level, it has the same effect as a through wall flashing, but without the structural discontinuity.

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