No_6_December__1938_and_January__1939 — Page 33

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