Working with an inaccurate transit
or builder’s level can have serious
consequences, especially if you're
pouring concrete or building stairs. If
you share a transit among several users,
there’s no way to know for sure if it has
been treated with care, so many
builders will send their transit out periodically
for cleaning and a checkup.
This is a good idea, and generally less
expensive than a layout mistake, but
not something you’ll want to do very
often. Between trips to the transit doctor,
here’s how you can check the accuracy
of your instrument:
Find an area about 220 feet long and
as level as possible. Place two matching
leveling rods about 200 feet apart. Any
two stationary