Building Construction Handbook, Eighth Edition

Precast Concrete Floors ~ these have been successfully adapted

from commercial building practice (see pages 673 and 674), as an

economic alternative construction technique for suspended timber

and solid concrete domestic ground (and upper) floors. See also

page 352 for special situations.

Typical Details ~

cavity wall

insulated as required

BEAMS PARALLEL WITH EXTERNAL WALL

18 mm t&g chipboard

over vapour control layer

insulation

150 mm min.

organic material stripped;

surface treated with weed

killer: lower level than

adjacent ground if free

draining (not Scotland)

GL

dpc

stepped

ventilator

beam and

block

coursing

dpc slip

cavity tray

over vent

floor finish as

above or screeded

(reinforce in garage)

BEAMS BEARING ON

EXTERNAL WALL

this block

to wall

strength

beam

and block

dpc

if inner ground level is

significantly lower, this area to

be designed as a retaining wall

GL

vent

dpc

Domestic Suspended Concrete Ground Floors