Pales
:
The pales to be 2,4m long. The front edge to be curved
at 40mm dia. Tapering to 85mm at the back with a breadth
of 140mm minimum over the total length of the pale except
the section where the fixing rail passes through the pale.
Each pale to have one cut out to take the horizontal rail.
Each pale to be reinforced with 2 x 5,5mm x 2,2m long
steel bars. Beam
:
At the base of the pales a 200mm wide x 150mm deep concrete
beam is cast insitu to secure the pales, being embedded
in the beam a minimum of 50mm. Except where the ground
surface is rock, concrete, tarmac, paving block or other
unexcavatable material the beam will be installed below
ground level.
Concrete
:
Concrete strength to all pre cast items to be a minimum
of 30 MPa at 28 days.
Additional
Information :
Installation : Foundations to be 400mm x 400mm x 600mm
deep, 15 MPa concrete. Posts are spaced at 2,0m centres
and are slotted to take a horizontal rail. The pales
are hooked over the top rail and the open groove below
the rail is then caulked with a 2:1 sand cement grouting
mix.
During the concrete casting process, the product is
placed on a high frequency vibrating table thus giving
a high density concrete , extremely impervious to water. |
