| What
is the concrete mix to be used? |
The
mixture used is varied depending on what is to be
built, the cost and availability of materials in the
locality of the proposed site. The Detailed Construction
Guide packaged with the machines, gives 17 different
concrete mixes that can be used depending on the application.
For
general planning purposes, a generic mix of 2 parts
13mm concrete stone; 3 parts river sand; 3 parts building
sand and 1 part cement can be used.
|
| How
long does one row take to dry before the next row can
be built? |
One
and a half hours. So if a FinnBUILDER Operator starts
building at 07h30 from point A, and reaches point B
at 09h00, he can immediately come back to point A and
start his second row of the day at 09h00. It follows
that he will start the third row at 10h30, the fourth
at 12h30 after lunch, the fifth at 14h00 and the sixth
at 15h30. |
| How
long must the concrete remain in the FinnBUILDER before
the FinnBUILDER can be moved forward? |
As
soon as the concrete is compacted and the FinnBUILDER
has been levelled, the machine can immediately be moved
forward. This normally takes between one or two minutes. |
| How
much walling can a FinnBUILDER Operator build in one
day? |
About
20m2 of vertical walling a day. A Trainee will complete
about 10m2 a day and progress over time to 20m2. By
comparison a bricklayer will do about 7m2 of vertical
walling a day (800 bricks per day). |
| Is
the FinnBUILDER Rational Design approved by the NHBRC? |
Yes. |
| Will
local authorities approve building plans that specify
FinnBUILDER? |
Yes.
Based on the accreditation of the FinnBUILDER system
by the NHBRC, all local authorities in South Africa
will approve building plans. Building plans have also
been approved in most countries based on this accreditation. |
| Will
the Banks approve building loans for homes to be built
with FinnBUILDER? |
Yes.
All four major Banks in South Africa are granting buildings
loans for new homes to be built with FinnBUILDER. In
some cases they offer 100% loans including the cost
of land. |
| How
do I buy FinnBUILDER machines? |
Customers
make a payment and the machines are delivered door to
door within 2 to 4 working days in South Africa. International
deliveries take 7 to 14 days. See
How to Order. |
| Where
can I find FinnBUILDER branches? |
We
do not have Branches in different countries. Instead
product is delivered to Customers door to door. |
| How
can the FinnBUILDER system be best described? |
It
is slip-form concrete shuttering using no-slump reinforced
concrete. The strength of the concrete is varied from
5 MPa to 40 MPa depending on structural requirements. |
| What
is the FinnBUILDER Rational Design? |
See
details of the design under TECHNICAL
|
| What
must the FinnBUILDER note on Building Plans specify? |
FinnBUILDER
Note
Walls
to be built with FinnBUILDER moving shuttering using
15 MPa no-slump concrete as per Rational Design. External
walls to be 220mm wide with Y8 reinforcing steel horizontally
under all window cills and vertically both sides of
all openings. Internal walls to be 110mm wide. 100mm
high ring beams at 2200mm and 2700mm height with 25
MPa concrete incorporating Y 12 reinforcing steel
horizontally in all external and load bearing walls.
Wall plate height at 4 600mm.
(Please
note that the concrete strength, external wall thicknesses
and wall plate height can be varied as required)
|
| What
quantities of material are required to build 1 m2 of
wall? |
This
depends on which of the 17 given concrete mixes is
selected and the required strength, however using
the generic mix, the following can be stated for a
220mm wide wall;
| Material
|
Mix
|
Quantity
per m2 wall |
| 13
mm Stone |
2
parts |
0,066
m3 |
| River
sand |
3
parts |
0,099
m3 |
| Building sand |
3 parts |
0,099 m3 |
| Cement |
1 part |
43 kgs |
|
| How
can quantities required be calculated? |
-
Take off Quantities Measure the length of all 220
mm wide walls from the final building plans. Multiple
the length by the height of the walls. (This is
commonly referred to on the building plans as the
wall plate height). This calculation will give you
the area or square meters of vertical walling to
be built. Now add on the area for gable walls and
deduct for the area taken up with windows and doors.
- Calculate
Quantities Having arrived at the area of vertical
walling above, now multiply the area (m2) by the
factors shown. This will give the m3 of materials
required, or in the case of cement the kilograms
of cement required. (e.g. 13 mm Stone = 100m2 x
0,066m3 = 6,6m3)
Divide the kilograms of cement required by 50 to
arrive at the number of bags of cement required.
(e.g. Cement = 100m2 x 43 kgs = 4 300kgs / 50kgs
= 86 bags)
|
| Is
dpc and brickforce used? |
Yes,
both dpc (damp proof course) and brickforce are used.
|
| Can
FinnBUILDER be used to build double and triple storey
structures? |
Yes.
A Civil or Structural Engineer can vary the width of
the walls, the concrete strength to be used or the rational
design to suit requirements as he deems fit. |
