Did you post this pricture of a deteriorating lintel?

[mthomas2]

I turned up this picture during a web search, and would like to identify the author to obtain permission to use it (with attribution, of course, and a link if desired) in an article for my web site:

The link is http://www.nachi.org/bbsystem/usrimages/P/PA190077.JPG

Thanks.

[Bob Elliott]

What do you think caused that issue Michael?

[Roy D. Cooke, Sr]

I think frost when water freezes it generates 25,000 lb per sq inch.
In order for a 1/2 pipe to stand the pressure it needs a 2 inch wall .

Awesome

[mthomas2]

Looks to me like a lintel installed above a plugged through-wall AC opening expanded and lifted the sill. Hopefully, the OP will show up and tell us.

[ROBERT V. YOUNG]

Originally Posted by mthomas2

I turned up this picture during a web search, and would like to identify the author to obtain permission to use it (with attribution, of course, and a link if desired) in an article for my web site:

The link is http://www.nachi.org/bbsystem/usrimages/P/PA190077.JPG

Thanks.

The lentil is put in place to act as a weight to stop or to slow down brick movement on window openings.
The area should have been maintenanced years ago.
>The cause is from frost.
The frost is caused by the migration of humid air into the wall cavity ,during below freezing weather and the vapors turn to frost..
The air is carried into the opening ( a crack,unfinished masonry joint , caulking that shrank,or what ever) between the walls and the warn side acauses draftup the wall and the cold side ( brick)attracts the vapors and turns it to frost.
Also there is a flaw in the brick style.
There is a ladder pattern just below the window with a stretcher bond above only 2 courses high with the lentil on top.
More room for movement in the brickwork if there is a problem.
And there was.

[Bob Elliott]

Originally Posted by mthomas2

Looks to me like a lintel installed above a plugged through-wall AC opening expanded and lifted the sill. Hopefully, the OP will show up and tell us.

That was my first thought.
On closer look the ac unit in the window is a custom skinny unit made for casement windows that I personally refer to as Florida windows because they lack proper sealing methods with only one latch in the middle.
I am also noticing that the co axial cable is going through the window.
Lots of possible water intrusion going on in what may be a CHA or project building.

[Kenton H. Shepard, CMI]

Originally Posted by mthomas2

Looks to me like a lintel installed above a plugged through-wall AC opening expanded and lifted the sill. Hopefully, the OP will show up and tell us.

That's not a lintel. Lintels in brick walls are steel angle installed above windows. Their purpose is to transfer the structural load that would otherwise have been carried by the brick in the opening.

That is a buckling of brick a couple of courses below the window sill. I don't know what caused it.

What's an "OP"?

[Wayne B. Wilson]

Looks like a solid brick building, windows were filled in with brick veneer , And has just collapsed or shifted.

[John Onofrey]

Other People

[mthomas2]

Originally Posted by kshepard

That's not a lintel. Lintels in brick walls are steel angle installed above windows. Their purpose is to transfer the structural load that would otherwise have been carried by the brick in the opening.

That is a buckling of brick a couple of courses below the window sill. I don't know what caused it.

What's an "OP"?

A lintel does not have to span a window or door, it can be placed above any type of horizontal opening to support the load above, for example at a through-wall penetration for a sleeve type air conditioner.

This picture turned up as a result of a GOOGLE for "deteriorated lintel", and at least when viewed initially the damage is consistent with the appearance of damage caused by oxide jacking at a lintel left in place when a fill-in was performed (see the enlarged image, which shows what looks - to me, anyway - suspiciously like a corroded and expanded lintel immediately below the lifted masonry and sill).

Freeze-thaw jacking is is being proposed as an alternative explanation - I'm hoping someone will hunt up the original thread so that we have a definitive cause.

"OP" = Original Poster.

[ROBERT V. YOUNG]

Originally Posted by ryoung7

The lentil is put in place to act as a weight to stop or to slow down brick movement on window openings.
The area should have been maintenanced years ago.
>The cause is from frost.
The frost is caused by the migration of humid air into the wall cavity ,during below freezing weather and the vapors turn to frost..
The air is carried into the opening ( a crack,unfinished masonry joint , caulking that shrank,or what ever) between the walls and the warn side causes draft-up the wall and the cold side ( brick)attracts the vapors and turns it to frost.
Also there is a flaw in the brick style.
There is a ladder pattern just below the window with a stretcher bond above only 2 courses high with the lentil on top.
More room for movement in the brickwork if there is a problem.
And there was.

Thanks for catching that. Its not a lentil its a sill.

Sorry I just came home from Thanks-giving supper dinner with my mother and was tired
.
Its a ('' SILL'' A ''WINDOW SILL'') sorry,not a lentil.
Look at the ladder stack brick and notice the stretcher course above it -WERE THEY MEET--the bond is broken on 2 courses. stretcher bond and ladder bond have 2 common but joints meeting plumb.
A weakened area.
Bricks have a bond to make them strong. Flemish bond ,Irish bond, Stretchier bond, the way the bricks are laid in a course running horizontally.
Dam I will learn to take picture out of here and show you guys what I mean one day by drawing on it and then put it back, but not now.
Breaking a bond weakens the jointing and now you see what happens.
Follow the butt ends (end of brick) joints see how they are staggered.
Like in flooring and dry-wall placement.
They must not be stacked on top of each other like in the ''ladder stack'' brick
on top of each other perfectly parallel and horizontally.
Ladder stack bond is the weakest bond in brick-laying.
Place the stretchers and just 2 courses on top of that ( ladder stack element ) above ,and by placing it below a window element or ANY opening of the wall.
Presto a perfect place for a problem to arise.
AND IT DID.

[mthomas2]

Originally Posted by ryoung7

Thanks for catching that. Its not a lentil its a sill.

I'm referring to the location below the still and lifted masonry:

[mthomas2]

BTW,


This is a lentil:




This is a lintel:

[ROBERT V. YOUNG]

I have tried 3 times and I am having problem with my PC.
I will get back later before I through this sh-t in the garbage.
3000 computer nothing but a pain in the asssssssssss.

[ROBERT V. YOUNG]

Originally Posted by ryoung7

I have tried 3 times and I am having problem with my PC.
I will get back later before I through this sh-t in the garbage.
3000 computer nothing but a pain in the asssssssssss.

every one excause me but this computer is going off line till fixed.