Pales :
The pales to be 2,7m long. The front edge to be curved at 40mm dia. Tapering to 100mm at the back with a breadth of 140mm minimum and the width 85mm from the front radius to 90mm. Each pale to have one cut out to take the horizontal rail. Each pale to be reinforced with 3 x R5,5x 2,2m long steel bars. 9 pales per 2,0m section mass each 66Kgs

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 precast 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.