Safety barrier construction of snowmobile race tracks of any
type shall conform to one of the following options and shall be constructed in
a manner described herein and Figures 1, 2, 3, 4, 5 and 6 as appropriate.
Figures 1, 2, 3, 4, 5 and 6 and the specifications contained therein are
incorporated herein and made a part hereof.
A.
1.
General
When this option is utilized, spectators shall be protected
by using parallel fence construction to consist of two separate fences; one
fence to be located against the edge of the track, to be called the trackside
fence and another located at least 6 feet or more from the trackside fence, in
a direction away from the race track, to be called the spectator protection
fence. The area between the fences shall be kept clear. Either woven wire or
snow fence shall be used, but each separate fence shall be constructed with
only one type of fencing. The woven wire or snow fence shall be attached to
either metal or wood posts as specified herein. Post lengths shall be as shown
in Figure 3.
2. Materials
All materials used in the construction of the fences
specified shall conform to the following specifications:
a. Snow fence. Pickets shall be cedar,
seasoned before the fence is woven, shall be straight grained and free from
large knots. They shall be 4'0" high, 1-1/2" wide and 3/8" thick. The
connecting wires shall be 5 double strands of 12-1/2 American gauge galvanized
wire evenly spaced. The spacing between pickets shall not exceed 2
inches.
b. Woven wire fence. Woven
wire shall be standard galvanized farmfield fence, design number 1047-12-11.
The wire shall be 47 inches high, having 10 horizontal wires of which the top
and bottom wires shall be of 9 gauge and the intermediate wires of 11 gauge;
and vertical stay wires of 11 gauge spaced at 12 inches.
c. Metal posts. End, intermediate, and corner
posts shall be 2-1/2" X 2-1/2" X 1/14" angle or 2" nominal diameter galvanized
steel pipe, minimum weight of 3.65 lbs. per foot. Braces shall be 1-3/4" X
1-3/4" X 1/14" angle or 1-1/14" nominal diameter galvanized steel pipe, minimum
weight of 2.27 lbs per foot. Line posts shall be standard studded "T" posts
with a minimum weight of 1.33 lbs. per foot or standard lug "U" posts with
minimum weight of 1.12 lbs. per foot. Posts lengths shall be as shown in Figure
3.
d. Wood posts. Wood posts shall
be cedar, white oak or tamarack. They shall be seasoned stock, straight and
sound, and shall have been cut from live growing trees. They shall have all
knots trimmed flush with the surface. Post diameters shall conform to the
following: End, intermediate and corner posts shall have a minimum diameter of
4 1/2" at the small end. Braces shall have a minimum diameter of 3" at the
small end. Line posts shall have a minimum diameter of 3".
3. Installation
a. General. The fence shall be installed as
shown in Figure 3, in conformity with these specifications, except that only
the front (trackside) fence shall be required to have end, corner, or
intermediate posts set in Portland cement concrete. At the time of racing the
top of the fence shall be at least 3'6" above the track surface.
b. Posts. Holes for wood posts shall be dug
to full depth as appears in Figure 3. Metal posts shall be set by means of a
hand or mechanically operated post driver. An intermediate post shall be
installed at least every 100 feet. Posts shall be set on 10 foot
centers.
c. Bracing. Bracing shall
be installed at all end, corner and intermediate posts as shown in Figure
3.
d. Erection of snow or woven
wire fabric. Fencing shall be stretched taut. For snow fence all strands of
wire shall be attached to each post. For woven wire fence the top and bottom
strands of wire shall be attached to each post and the alternate interior
strands of wire shall be attached to alternate posts. Splicing of the wire
shall be permitted at posts only and each horizontal strand of wire shall be
wrapped completely around the post. The wire strand shall be securely fastened
by winding the end of the wire about the same strand where it leads up to the
post. This type of fastening shall be used at each end and the corner post.
Staples for wood posts shall be fully driven into corner, end or bracing posts
but at line posts they shall be driven so as not to restrict the horizontal
movement of the wire.
e. Baled hay.
The trackside fence shall be buffered by at least two parallel layers of baled
hay at least 3'0" high as shown in Figure 4. The baled hay shall be laid
lengthwise along and directly against the fence. The baled hay shall be tightly
baled and shall be replaced when damaged or when its condition is such that in
the judgment of the Commissioner it will not accomplish the purpose of
buffering the trackside fence.
f.
Rub-rails. As an alternative to buffering by baled hay, rub-rails may be
installed on the trackside fence as specified in Figure 6. Rub-rails and splice
plates shall be of dry and well seasoned Number 2 common grade stock of
northern white pine, Norway pine, or Number 1 construction grade of eastern
spruce, eastern hemlock, or tamarack, and shall be dressed on all sides. The
dressed dimensions shall be 1 5/8" X 9 1/2" and of a length indicated in Figure
6.
OPTION 2 - 60 INCH CHAIN LINK FENCE
B.
1. General
When this option is utilized, spectators shall be protected
by using a single chain link fence to be located against the edge of the track
and called the trackside fence. The fence shall be attached to metal posts as
specified herein and installed as specified in Figure 5.
2. Materials
All materials used in the construction of the fence specified
shall conform to the following specifications:
a. Chain link fabric. Chain link fabric shall
be standard zinc or aluminum coated steel. It shall be 2" mesh, fabricated from
number 9 gauge wire. The fence shall be 60" high.
b. Posts. End or corner posts shall be 2"
nominal diameter galvanized steel pipe, minimum weight of 3.65 lbs. per foot or
2-1/14"X 2" steel "H" section, minimum weight of 4.10 lbs. per foot. Line posts
shall be nominal 1-1/2" diameter galvanized steel pipe, minimum weight of 2.72
lbs. per foot or 1-7/8"X 1-7/8" x 1-5/8" steel "H: section, minimum weight per
linear foot = 2.70. Brace tubes shall be nominal 1-1/14" diameter galvanized
sheet pipe, minimum weight of 2.27 lbs,per foot. Post lengths shall be as shown
in Figure 5. Posts shall be set on 10 foot centers.
c. Erection of chain link fabric. The top
rail shall pass through the post caps and shall be securely fastened to end,
corner and brace posts. Joints in the top rails shall be made with expansion
sleeve couplings. The fabric shall be pulled taut and the ends attached to the
posts with stretcher bars and bands. When required, rolls of wire fabric shall
be joined by weaving a single strand of mesh wire into the ends of the rolls to
form a continuous mesh.
