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14
INSTALLATION OF FOUNDATION
As a concrete casting of the foundation, we use ready-mixed concrete or site-mixed concrete.
Preparation of the excavation pit.
Installation of the wooden 25-30 mm formwork.
Laying of the setting pads: compacted 150-200 mm sand pad, then 150-200 mm layer of
gravel (50-70 mm fraction).
Installation of the reinforcement cage (
А
-III 10 mm reinforcing bars, bas fastening is done with a
binding wire).
Concrete pouring.
Installation of the moisture penetration barrier.
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During production of the ready-mixed concrete, manufacturer addresses more than one dozen of
parameters and characteristics thereof concrete's quality is higher!
When concrete is mixed on-site (for large volumes of foundation) it ought to be noted that the
interval between pouring shouldn't be longer than 12 hours.
For a time of solidification (up to 22 days) the foundation should be covered with polyethylene
sheeting and, if necessary, irrigated with water in order to avoid sudden water evaporation.
SIZE CALCULATIONS FO THE
FOUNDATION
Width (mm) = b + 2xb + 2
х
b + 2
х
e where,
f
ac
о
p
shd
E is the thickness of the protective heat-retaining shield (natural stone – 40-60 mm, brick - 65-120 mm)
shd
b is the width of the furnace
f
b is the width of the air clearance (50-70 mm)
ac
b is the width of the supporting structure for floor decking (0-100 mm)
ss
Length (mm) = l + 2
х
b +
Δ
+ b where,
f
shd
Eshd is the thickness of the protective heat-retaining shield
l is the length of the furnace
f
b is the width of the air clearance (40-65 mm)
ac
b is the width of the supporting structure for floor decking (0-100 mm)
ss
Height (mm)= h +h
– h where,
fr
floor
bl
Hfr is the depth of frost penetration
h
is the height of the floor above ground
floor
h is the height of brick layer and moisture penetration barrier in the foundation
bl
Содержание ANAPA
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Страница 20: ...Pic 6 Example of the furnace with a brick cover which heats up both resting and sweating rooms 1 20 ...
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