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The following instructions are designed to help set up a field from a
relatively level, open area of ground. In addition to the field set-up
requirements, keep in mind that to have a quality playing surface,
sports fields must have the following:
1. adequate water
drainage 2. properly designed, installed and maintained irrigation
systems 3. a sound maintenance program to address turf and clay
conditions
Baseball and softball are the only major
sports that are played on fields that have both turf and exposed soil for a
playing surface. Since about 66% of the game is played on the infield, "skinned"
areas should receive as much attention as the turf areas. The concept of clay
management is similar to turf management in that it is difficult to write a
maintenance program for all infield skinned areas due to diversity among infield
soils. One thing that does not change though, is the basic layout.
The following list is a basic 13-step
program for laying out a baseball field (Figure 1). If you can follow these
basic 13 steps, you can build your own field of dreams. In addition to the
steps, a few tips and suggestions were also included. A few basic tools such as
shovels, rakes, a couple of measuring tapes, a small sledge hammer, a tamp or
roller as well as some supplies such as stakes, string, paint (inverted aerosol
spray cans), pitching rubber, bases, and home plate are needed to complete this
project. Power tools and some extra hands will make the project go much
faster.
Basic Baseball Field
Layout
1. Start with a flat, open area. If
some elevation is on-site, it should be in the infield area. Ideally, the open
area has a good, dense stand of turf or with a little help one can be
rejuvenated. If that is not the case, plan a turf management program to coincide
with the construction of your ball field. It is helpful to mark out the
components of an infield with paint as outlined below to visualize the field
before you actually start removing turf.
2. Placement of home plate
determines layout of the field. Be sure to plan for some type of backstop to
contain stray pitches and to protect fans from tipped balls. If it is truly a
backyard field and fans behind the batters box are not likely, planting shrubs
about 60 feet (minimum required for high school and college fields) behind home
plate may prevent errant balls from rolling too far away from the
field.
3. Using the apex of home plate
(back corner), cut out turf in a 13-foot radius.
4. The next step is to locate
second base. Measure from the back tip of home plate to a distance of 127 feet
and 3 3/8 inches (see Table 2 for distance between bases for other leagues).
Mark with a wooden stake. When installing base pads, this will be the center of
second base.
5. With the tape measure still in
place, it is easiest to go ahead and mark the location of the pitching rubber at
this time. The placement can be marked by measuring from the back tip of home
plate along a string stretched to second base. The pitching rubber should be at
60 feet 6 inches.
6. The easiest way to find first
and third base is to use two tape measures. Stretch one tape from second base
stake toward the first base line and the second tape from the back tip of home
plate toward first base area. The point where the two tapes cross at the 90-foot
mark is the back corner of the bases. Repeat this step to find third base. A
baseball diamond is actually a 90-foot square.
7. First and third base fit within
the square, but second base is measured to the center of the bag. Improperly
placed second base is one of the most common mistakes made when setting up a
baseball field.
8. To make a "slide area" around
the bases, cut out turf around bases by measuring a 13-foot radius within the
90-foot square. You can leave the base paths grassed if you like, or you can
turn them into skinned base paths.
9. Next, turn your attention to the
pitcher's mound. The diameter of a pitcher's mound clay is 18 feet, with 10 feet
from the front of the rubber, toward home plate and 8 feet from the back of the
rubber.
10. The top of the mound consists
of a plateau that is 5 feet wide.
11. A regulation pitcher's mound is
10 ½ inches high (compared to surface level of home plate). Miscalculation of
the pitcher's mound height is probably the second most common error in setting
up a baseball field. A transit or field level is best for setting the height,
but in a pinch, other methods my also work. I once saw a guy peering through a
cheap scope clamped to a carpenter's level on a makeshift tripod. Another option
is to use your stakes with taut string and a ruler. A standard pitcher's rubber
is 24 inches by 6 inches.
12. Building a pitcher's mound is
as much an art as it is a science. Build the mound from ground up, 1 inch at a
time keeping in mind the mound's slope (see next step). As you add each layer,
tamp or roll the soil.
13. Beginning 12 inches in front of
the pitcher's rubber and measuring toward home plate, for every one foot of
distance the slope will fall one inch (until the slope meets ground
level).
The mix used to build the pitcher's
landing area (and often the batter's box and catcher's box) should have a
significant concentration of clay to provide the necessary stability to resist
degradation from increased traffic. A good material will be about 40% sand, 20%
silt, and 40% clay. If necessary, you can mix individual components together.
Just be sure that individual components are evenly distributed throughout the
material.
A quality infield material will have a
lower concentration of clay than the pitcher's mound. The infield skin should be
moist and firm, not hard and baked dry. To achieve firmness, an infield mix
should not be too sandy. An infield mix with greater than 75% sand causes
unstable footing for ballplayers and increases infield skin maintenance
problems. A sandy infield will create low spots more quickly and is more likely
to create lips at the infield skin/turf interface. Ideally, the infield mix
should be between 50% and 75% sand and 25% to 50% clay and silt. A combination
that has been successfully used is a 60% sand, 20% silt, 20% clay base mix
(sandy clay loam to sandy loam). The silt and clay give the mix firmness. If the
mix contains too much silt and clay, compaction and hardness become a
problem.
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