grouted masonry vs prison break
grouted masonry vs prison break
(OP)
http://www.wnbc.com/news/14865097/detail.html#
Check out this picture of the masonry wall through which those prisoners in that NJ prison escaped.
It doesn't appear that any grout was ever in that cell on the left with that vertical rebar.
Check out this picture of the masonry wall through which those prisoners in that NJ prison escaped.
It doesn't appear that any grout was ever in that cell on the left with that vertical rebar.






RE: grouted masonry vs prison break
RE: grouted masonry vs prison break
It was probably a contractor error, never discovered during the inspections, assuming there were some.
You're absolutely correct in your thinking here.
Mike McCann
McCann Engineering
RE: grouted masonry vs prison break
On the other hand, I've seen many residential fence walls that fell down after the Northridge Earthquake that had bars with no grout.
RE: grouted masonry vs prison break
Geezzz, how about a total breakdown of the inspection and observation process.
RE: grouted masonry vs prison break
from what i've heard about discussion from prison jobs, the rebar is closely spaced and all cells fully grouted. the only jobs with more reinforcement and grout is big bank jobs...and they add lasers and all sorts of other cool stuff.
RE: grouted masonry vs prison break
First week of masonry on one of my jobs. And I am not making this up, but I just received an RFI in which the masonry contractor requests a deviation from the code required consolidation and re-consolidation of grout. He believes that the "vibration" delivered to the grout by wet sticking the rebar into the grout is sufficient to satisfy the requirements ACI-530 3.5 E and thus a mechanical vibrator in not needed and at any rate the inspector (that's me) is just mean and a nit-picker.
RE: grouted masonry vs prison break
I have similar one for you. Ever seen paper towels stuffed in the stressing pockets of post-tensioned tendons so one doesn't have to mix up so much grout to patch the pocket-former holes!
RE: grouted masonry vs prison break
RE: grouted masonry vs prison break
RE: grouted masonry vs prison break
RE: grouted masonry vs prison break
A number of wall sections (20to 30) were built and were subjected to consulatants (ex-inmates) and others (a srange group) with the challenge to get through them. The same process was used on the windows(lighters/matches, vasiline and sugar were best) and on fixtures. The project ended up with a structure of some poured in place walls with postensioned slabs and many, many 8" reinforced ( 8" or 16" o.c.) CMU walls grouted solid since solid grouting was cheaper. The biggest challenge was building and anchoring the many interior CMU walls to the slab and ceilings without coring into cables.
The problem obviously rests with the inspection and implementation since the constructability is not a problem if the details are thought out in advance.
I have also seen residential basement concrete contractors that always had 4- 4' lengths of #5 bars and few standard lengths that were always on hand. When an inspector came around, the short lenghts were inserted into the fresh concrete and the full lengths made obviously ready and available if needed. The contractor only bought a few legths each year to replace any that might have been used. - The ironic thing is that the footings did not need any longitudinal reinforcement by code, but the contractor always got a high rating from the inspectors.
RE: grouted masonry vs prison break
RE: grouted masonry vs prison break
Whats the point of locking them up in that cell. They could break out without much difficulty, if they want to!!
RE: grouted masonry vs prison break
RE: grouted masonry vs prison break
The ridiculous part of the inspection is that you can tell if a cell is grouted with a hammer. It's so easy. The sound difference is unmistakeable.
Mike McCann
McCann Engineering