Assembly Details

All columns are supplied as non-structural decorative items in full or in halves, solid or with a 90 or 120mmØ core depending on design. The hollow format may be used to incorporate a load-bearing core but this must be designed by a structural engineer with appropriate experience. All columns are supplied with cast-in lifting eye sockets and threaded 12 mmØ dowels, cut to length.

Solid column sections are supplied with an M12 cast-in socket. A lifting loop should be screwed into socket for lifting of column shaft.

Stage 1 Base Block and Column Pedestal Base
Bed base block and column pedestal base using 3 no. spacer shims to maintain bed joint size of mm. It is suggested that plastic ‘U’ shaped spacers are used. Pack to level and plumb each stone. Ensure that the central hole is kept clear.

Stage 2 Column Base
Bed column base as above and use 12 mmØ galvanised rebar 625 mm long drilled and grouted through the base blocks into the concrete foundation using 25mmØ holes. Ensure that 90mm of the rebar is projecting from top to locate column shaft. Fill in centre hole with mortar.

Stage 3 Column Shafts
Lay each column shaft following above procedure, ensuring that threaded dowels are fitted and located to each stone.

Columns can be used in varying situations and professional advice should be sought with regard to restraining/tying in the column to the structure concerned.

Bedding and Jointing 
Each column section should be bedded and jointed using 1:1:6 cement/lime/sand mortar or similar. Joints should be 6mm wide and the mortar slightly recessed from the surface to allow for pointing.

Pointing should be carried out using MDL Precast colour matched pointing mix as per the supplied instructions.

Advice offered by Amber Precast Ltd is given in good faith and it is to the best of our knowledge accurate and true, but is offered without guarantee.

If you require more information please contact us on:
tel: 01773 540707 email:

Reference: TDS/002 JANUARY 2010