Yesterday, I just poured nearly 40 sq. yards of concrete (4 concrete trucks) in preparation for moving two self-supporting Pirod towers. One tower is 140ft., the other is 100 ft. When the contractor
There's an urban myth about "undisturbed soil." Hams believe that pouring concrete against undisturbed vertical dirt walls is the only way to place a footing. It is often the easiest way to do it and
I think it's more than just an ..."urban myth"... . by the Tower Manufacturer. 73, Dick, W1KSZ _______________________________________________ _______________________________________________ TowerTal
. I my experience in installing concrete bases. of varying sizes and challenging soil composition. The more challenging being Shale, Sandy loam and wet land ( where you had to pump the water out as y
That's where the urban myth came from. It's on tower manufacturers plans but it gets misinterpreted as gospel. If we couldn't use forms and compacted backfill, there would be thousands of buildings,
Just overpour the concrete. You'll never get the soil back to natural compaction. No forms in the hole, just fill the void with concrete. _______________________________________________ _____________
I think the lawyers also had a hand in the wording to protect the company. 73 N7RT That's where the urban myth came from. It's on tower manu- facturers plans but it gets misinterpreted as gospel. If
I agree with K6OK--this works. Here in Brooksville and most of Hernando County the soil is pure sand down to about 12 feet. If you can dig the hole and lightly spray the side walls with water so surf
By that logic, the slab of my garage floor should be about five feet thick at one corner. Instead, a reinforced concrete stem wall constrains engineered backfill that was placed in 6 inch lifts and b
Generalizations like that typically don't make sense, and yours is no exception. I built my house on a hillside and had to backfill against a six foot high retaining wall with hundreds of cubic yards
Thanks to all who replied by private e-mail. Many folks suggested using a concrete cutter to trim the base edges square. Yesterday, I went back out to the site and took some measurements of the leg b
The new concrete won't adhere very well to the old and will probably crack. (Here in AZ almost all houses are slab-on-grade. There is a saying, "There are two types of concrete slabs, those that are
I would suggest you put wire mesh centered in the two inch thick pour which may help to keep the concrete from cracking. Howard WA9YBW The new concrete won't adhere very well to the old and will prob
Author: Patrick Greenlee <patrick_g@windstream.net>
Date: Sat, 4 Feb 2017 10:49:27 -0600
As long as the thin top coat of concrete is cosmetic and not structural you won't get in trouble but I recommend you put some steel in it if you don't want to risk it breaking up later. Fence materia
Paul, I fully understand the anguish you are feeling over this. I alphabetize my sock drawer. When the base has had a chance to set up hard, rent a large abrasive concrete cutting saw and trim the tw
which may help to keep the concrete from cracking. Howard WA9YBW" Great idea from you and others. Many thanks. Paul, W9AC _______________________________________________ ____________________________
Jim Actually, undisturbed soil is not an urban myth, it's just the simplest way for the engineer to calculate the foundation design. The vertical walls of the undisturbed soil create friction against
The standard 4x4" or 8x8 mesh is for 3 or 4" thick slabs. For thin slab reinforcement I've used expanded 9 ga steel from McNichols with 3/4" openings. Small aggregate is used. You never want to try t
Steve -- "Urban myth" might not be the best choice of words? The idea I was hoping to convey is that the manufacturer's recommended footing design are sometimes interpreted to mean that it is the one
Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Sun, 5 Feb 2017 03:59:30 -0500
Many times, pouring against undisturbed soil is not possible. an alternative to the compactor is a uniform slurry. If done properly it will form a solid and uniform connection between the form and th