Information Request # 494
Information Request # 385
The traditional way to ensure a fence was straight was to lay the
four corner posts and tie string. This works, but can be tedious. The
string must be pull taut, which can be difficult if you are building a
fence in a large area. The string may be affected by the wind, which
could cause your measurements to be inaccurate.
There are two different options available for layout tools: laser and optical. An optical instrument such as a level is set
up on a tripod and should be pointed along the length of the
fence. The user can then look through the eye piece to discover the correct positioning for the fence posts and then make
necessary adjustments.
Another alternative is to use a construction rotary laser to lay the
fence posts. Construction lasers emit a straight beam that can be used
to align the fence, but will need to be used with a detector when doing
exterior work. By running this detector along the length of the fence
you will be able to identify straight and plumb.
Make sure the rotary laser you are using has a vertical feature so
you can lay the instrument on its side for a vertical plane. A horizontal and vertical rotary laser has a self leveling feature that insures
that the reference line is level and plumb. A laser line generator is
generally a less expensive alternative, but can only be used on smaller
job sites.
Of course you need a strong back and the trusty pole-hole diggers,
or if you're lucky, a tractor with an PTO-driven auger attachment.
A d v a n c e d Tr a i n i n g
DBM
The American Fence Association www.americanfenceassociation.
com offers a professional certification to fence installers with more
than five years of experience. LC
Information Request # 445
February 2013 39