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this modification, an attached shelter is
entered through the basement of the house,
thereby permitting dual use of the shelter
space. Other advantages of this
modification include flexibility of shape
and design to conform to the house design
and the use of the same kind of building
materials as used in the construction of
PLAN
the house.
If the topography permits, the shelter can
be built into a hillside or embankment.
This modification increases the protection
factor by the addition of an earth mound
over the shelter. A maximum of 3 feet of
earth cover is recommended.
The principal advantage of this shelter
modification is that it can be erected with
a minimum of excavation in locations
where there is poor drainage or where the
ground water table is close to the
surface. However, the exposure of
the shelter above ground requires
the addition of earth mounding
around all sides.
This shelter modification permits the
chain
design and construction of a shelter with
door
a fairly small hatch entry. The iron rungs
stop
placed in the concrete wall will also
maximize the useable shelter area.
Entrance
MATERI AL LI ST
Quanti ty
Item
Concrete:*
60 cu. ft.
floor
235 cu. ft.
wal Is
50 cu. ft.
roof
345 cu. ft.
Total 13 cu. yds.
Steel Reinforcing:
580 lin. ft.
floor
945 lin. ft.
wal Is
260 lin. ft.
roof
Tot al 1, 785 l i n. f t .
Miscellaneous:
2
tie wire - 6 coils
1
hand blower w/mounting bracket
16 lin. ft.
3 galv. steel pipe
2
3 galv. ells
1
3 galv. tee
1
3 galv. cap
1
intake hood, w/screen
1
exhaust hood, w/screen
2
wood carriages, 2 x 12 x 10
9
wood treads, 2 x 8 x 2 -8
2
wood plates, 2 x 4 x 2 -8
1
hatch door, metal covered
1
wood plate, 2 x 8 x 7
1
wood plate, 3 x 8 x 14
3
T-hinges, 8 x E. H., galv.
1
hasp and staple, galv.
1
chain door stop, galv.
8
anchor bolts, 1/2 x 8
4
expansion shields and bolts, 3/8 x 4
715 sq. ft.
waterproofing membrane
100 sq. ft.
flagstone
1.5 cu. yds.
sand
12 lin. ft.
cant strip
Distribution:
*Form work not included.
FEMA Regions and Staff College
State & Local Civil Preparedness Directors
U.S. GOVERNMENT PRINTING OFFICE : 1980 0 329-359
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