5-5 struts 3-0 crs.
4 concrete slab
reinforced with Lewis dovetail corrugated steel sheeting
0,9
0 / 2 3
4 5F2-0
3:6
Ground
NORCON
AIR-RAID
SHELTER
Cost:
£10-£15 per person
I
0
2 FL
Hong Kong Builder
Rock garden 18 in. earth
9 in rubble
8*2*
12x2 plate
Revetment
as necessary
COVERED
TRENCH
Cost:
10/- to £3 per person
Gas-proof door
Seating
Rock garden Rubble
Windows fitted with armour plate glass
Level
Existing Ground Level
Concrete tube 4 in thick
Reinforced concrete
Gas-proof doors
Rubble
SWISS TYPE BOMB-PROOF SHELTER
Cost: £20-£30 per person
10 FT
Adapted from"Civil Defence" by C. W. Glover, M. Inst.C.E.
43
Է
0:09
Depth for complete protection
*
Cost: Approx £20 per
person