| FAQS |
| Q.
What are the roughness factors for channel flow calculations?
|
| A. |
Bazin----"N"=0.23 to 0.30. Manning--"n"=.0139
to 0.015
NOTE: These are estimated figures for surfaces ranging from a polished exposed
natural river gravel lightly
etched to normal limestone aggregate with a heavy etch.
|
| Q.
What is the size of the individual blocks?
|
| A. |
The standard
size is 400mm x 400mm x 80mm in panels 6 metres long x 2.4 metres wide.
Terrafix manufactured panel (3.6m
* 2.4m). A standard block weighs 27 kgms. Panel weight is 168 kgms per square
metre. A standard 6 metre x 2.4
metre panel which is the most suitable size for transporting on trailers,
weighs 2.42 Tonnes.
Other sizes can be manufactured
with a recommended minimum size of 240mm x 240mm x 75mm. The
recommended maximum size is 400 x 400 x150mm.
Larger blocks could be manufactured
provided that the ratio of the length of the side of the block
to the depth did not exceed 5 to 1. For example
a 20" square block would require a
minimum thickness of 4". Greater thicknesses could be especially designed.
NOTE: The blocks need not necessarily
be square. Other shapes can be used in a FLEXICRETE panel
such as: rectanguler, diamond, oval, circular,
"random".
|
| Q.
Can FLEXICRETE support wheeled traffic?
|
| A. |
Details of reinforcement can be designed to suit loading.
Refer to photograph showing asphalt
being placed on top of a FLEXICRETE roadway for access
over a breakwater.
|
| Q.
Can holes be provided in the blocks? |
| A. |
Holes up to 75mm in diameter(or square)
can be provided in a 400mm square block. Maximum four
holes per block. Larger holes could be provided
in larger blocks.
|
| Q.
Can trees be planted? |
| A. |
Individual blocks can
be cut out to allow for tree or bush planting. Sufficient earth should be
removed to ensure tree roots are well
under the surface and to allow for backfilling around the trunk with gravel
and rocks of an appropiate size.
|
| Q.
Can blocks be placed individually? |
| A. |
Where access by small
crane or boom truck is restricted individual blocks can be laid. Note that
the individual blocks would be interconnected
to provide a continuous mattress of FLEXICRETE.
|
Q.
Can panels be manufactured with some individual blocks removed,
but with reinforcement remaining to maintain
continuity? |
| A. |
The reinforcement can
remain. It could be used to reinforce in situ concrete which may be required
to embed a boulder or boulders in locations
as may be required by the landscape designer. The reinforcement could also
be cut and turned up to reinforce a cast
in place concrete upstand block and for other purposes as may be
determined by the designer.
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