HomeMy WebLinkAboutAddenda - RFP - P982 BOBCAT RIDGE TRAIL DESIGN AND CONSTRUCTON (20) 2309.18,2.33a, Ex. 01
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FSH 2309.18 - TRAILS MANAGEMENT HANDBOOK
WO AMENDMENT 2309.18-91-2
EFFECTIVE 11/8/91
2.33a - Exhibit 01
Barrier-Free Trail Guide
Easiest More Difficult Most Difficult
Width of Trail Tread
and Turnouts
One-way 4' Same as Easiest. 3'
Two-way 8' or 4' 4' or 3'
with turnouts 2' with turnouts. 1/
wide and 5' long.
Length 0 to 1/2 mile 1/2 mile to 1-1/2 miles 1-1/2 miles to 5 miles
Surface Concrete or asphalt Asphalt, soil cement Hard packed sandy
with subgrade of very fine crushed rock loam, some rocks and
rock. 2/ 3/4" (-) solidly packed roots allowed. Fill over
surface. 2/ large obstructions and
/ in wet areas. 2/
Clearing Clear understory Clear understory Clear underbrush to 6" Width and Type brush to 1' from trail brush to 1' from trail; from trail.
with slight slope no abrupt dropoffs
toward trail. adjacent.
Slope (grade) +1% to 3% 3/ +3% to 6% 6% to 8%
and Vertical Climb Vertical climb up to Short, steep pitches Short pitches up to
80' can be handled. One-way 12% 3/
trails with continuous
favorable slope over 5%
should be avoided. 3/
Vertical up to 160'.
Cross Slope Flat, with slight crown 1:30. Use grade dips 5' 1:20. Same as More
(pitch) 4/ for drainage. to 8' long as needed. Difficult.
Trail Edge Curb used where Curbs or railings only Curbs or railings only
(rails, curbs) necessary for safety: for safety or in areas for safety.
(Use natural rails 32" high for with side slopes greater
materials when- safety. than 40%.
ever possible)
2.33a - Exhibit 01--Continued
Rest Stops (Use Every 100' to 150' 400' to 500' 800'
natural materials Benches, sitting rocks,
whenever possible; turnouts, shelters; benches
4' deep and 5' long.) 17" high.
1/ As a rule, a steeper grade requires a wider tread, but this element can change with difficulty.
2/ Bridges and boardwalks should have nonskid material, with boards perpendicular to the direction of the trail and close together to prevent crutches from lodging in cracks.
3/ On slopes greater than 5 percent for 60 feet or more, allow a 6-foot level distance for resting.
4/ Consistent pitch is important for ease of travel in wheelchair.