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Broom Handle Transit
By George Porter
There is an old saying, "By your students you will be
taught." It apparently has been true in my case, because
I have never given a seminar when I didn't learn something from
the class. My latest tidbit of knowledge is just too good not
to pass on. On the second day of my seminar, I sometimes show
people how to layout a foundation using strings, batter board,
and a water level. The purpose is to demonstrate how you can use
a water level to create a perfectly level foundation, even though
the home is sitting on individual footings. For years I had been
measuring from the string down to the top of the concrete in the
hole so all the footings will be at the same level and the home
can be very easily blocked. I advocate using this method because
it s much easier to work standing up, walking around in a fairly
open area, than to be crawling around under a home dragging in
3" and 4" concrete blocks, and possibly running out
of them and then looking for chunks of lumber, smooth flat river
rocks, or whatever else is in the area in order to fill up the
gap between the footing and the home.
There are many, many advantages to starting off with a very
level foundation. However, not long ago, a fellow in Kentucky
showed me a new and better way to go. Still using the string and
batter boards to lay out the basic location of all the footings,
I then switch to a broom handle and the water level. Set up the
water level anywhere you like around the foundation and tape the
water level in the upper and lower portion of the broom handle
so most of the bottom part of the broom handle is able to go into
the holes you have dug for the footings. Then make an estimate
of how high you want the concrete to be in one of the holes, and
put the bottom of the broom handle at that level. Now make a
mark on the broom handle where the fluid in the water level comes
to. Then make a series of marks on the broom handle every four
inches above and below the original mark. As long as you pour
the concrete in the hole to the bottom of the broom handle with
the handle held so the water level is level with one of the marks
you made, you will be a four or eight inch block increment away
from having all the piers level at the top where the home will
rest.
What you are doing is using the water level like a transit.
Depending on the lay of the lot some footings will be made with
the extra four inch block and some might have an eight inch block.
There will be many footings that are exactly the same level.
However it works out, the home will be much easier to install
and you will not need a multi-thousand dollar transit to do the
job. If you already have a water level then get a broom handle
and you are fully equipped. You could also use a surveyor's pole
in place of the broom handle, but a broom handle has more character,
don't you think?
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