164
CHAPTER Il, SECTION 4
3 ms
w-a4uz-2
a-
Figure 2-137.
a- 5S
Applying Bare Course- NanAirstrip
NAN AIRPORT:
The airport consisted of a 150’ x 4500’ runway with 25’ on each side for shoulders, a 500’
x 425’ plane parking and service apron, and a
500’ x 425’ helicopter mat. Three operational
buildings were also provided. Work first started
on 28 December 1954 with the clearing of a
center line for the survey party; over-all site
clearing followed. The east 1,000 feet of the
The specified compaction of the sub-base
was obtained by utilizing sheep’s foot, grid, and
wobbly-wheel rollers. The material used for the
for compaction. The surface was removed to a
following gradation as typical:
proposed runway was found to be unsuitable
Sieve Size
100
90
87
#+ 30
# 50
29
6
+ 100
+ 200
sub-base was clean, non-organic sand with the
% Passing
x%
+ 4
+ 8
# 16
depth of 12 inches and replaced with borrow
material prior to placing sub-base. Borrow pits
were established alongside the proposed runway wherever suitable material was found.
77
1-5
0-4
Loose dry
unit weight
71.5 lbs./cu. ft.
Rodded dry
unit weight
80.5 lbs./cu. ft.
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