Shelter Plans Concrete Block - H-1 2-C.pdf

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H-l 2-C
May 1980
A compact shelter
is provided
in a basement corner
by the use of
common lumber
and concrete blocks
with mortar joints
for permanent construction.
HOME FALLOUT SHELTER
concrete block shelter-
basement location
FEDERAL EMERGENCY
MANAGEMENT AGENCY
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EXISTING FLOOR
OLLOW CONCRETE
ITS (THIS COURSE
2 EA 2x4 POSTS
EXISTING BSMT. FLOOR-J
m
VENTS
SECTION A
SECTION 8
FOR MAXIMUM PROTECTION
GROUND SHOULD NOT SE LOWER THAN THE
TOP CONCRETE MASONRY UNIT IN THE SHELTER
/--- 3’- IO” __jc__ 7’ - 3” ____I
PLAN OF PLYWOOO CEILING
u_. 5' - 4”_,
PLY WOOD
‘*
i7
” I 8" x 16” CONCRETE
ASONRY UNITS
2
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GENERAL INFORMATION
This compact basement shelter will provide low-cost protection from the
effects of radioactive fallout. Its purpose is to provide adequate protection
for the minimum cost in an existing basement. In addition to the low cost,
materials should be readily available, and the labor time will be short.
TECHNICAL SUMMARY
This shelter has about 50 square feet of area, 300 cubic feet of space
and will provide shelter for five persons.
The materials required to build this shelter are obtainable at local concrete
block plants and/or lumber yards.
Natural ventilation is provided by the entranceway and the air vents in the
shelter wall.
Estimated construction time for the basic shelter is less than 44 man-hours.
MATERIALS LIST
Actual
Number Required
Item
Masonry:
4” x 8” x 16” solid concrete masonry units or
2-l/4 x 4” x 8” solid bricks
4” x 8” x 16” hollow concrete masonry units
296blocks
1776bricks
7blocks
Lumber: (“Construction” or “No. 1” grade or better)
posts 2 x 4 x 5’-4”
joists 2 x 4 x 5’-4”
beams 2 x 4 x l0’-5-l/2”
frame 2 x 8 x 5’-4-3/8"
header 2 x 8 x 2’-3”
plywood l'-4” x 6’-9-l/4” x 3/4” (utility
B-C grade)
plywood 1’4” x 4’-3-3/4” x 3/4” (utility
B-C grade)
6
7
2
2
2
4pieces
4pieces
Hardware :
8d nails
10d nails
3/8” bolt size multiple-expanding machine bolt
anchors
3/8” x 3-l/2” square-head unfinished anchor
bolts
Mortar (prepared dry-mix bags
2pounds
2pounds
18
18
9bags
3
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Special tools :
3/4” star drill for 3/4” x 2-7/8” anchor bolts
CONSTRUCTION SEQUENCE
1. Lay out guidelines with chalk on basement floor for shelter walls.
2. Lay first course of 4” x 8” x 16” solid blocks in a full bed of mortar
to make the walls 8” thick. Vary the thickness of mortar bed if
basement floor is not level.
3. Set door frame in place and continue to lay wall blocks. Be sure
to leave the 4 ” spaces for air vents as shown on the drawing.
4. Continue this procedure until the walls have been laid up to a height
of 5’-8” (17 courses). This height can be increased, if the basement
headroom permits and provided the shelter roof remains below the
outside ground level.
5. Fasten posts and door frame to the basement wall using two expansion
anchors and bolts for each. Be certain the posts rest on the floor.
6. Nail two 2 x 4 boards together to make the wall beam. Nail the beam
on top of the posts and secure with expansion anchors and bolts to the
wall.
7, Place wood joists in position and secure with nails.
8. Place the 4” x 8” x 16” hollow blocks between joists as shown on the
drawing. The holes in the blocks will afford ventilation.
9. Put several 3/4” pieces of plywood on the joists as shown and nail
them to the joists with 8d nails.
10. Lay two layers of solid 4” x 8” x 16” blocks flat on top of the plywood;
stagger the joints. Mortar is not required in the ceiling.
11. Continue procedures 9 and 10 until the roof is completed.
12. Additional blocks stored in the shelter are for stacking in the entryway
after occupancy.
4
 

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