NAMM’s Memorial Ground Support Fixing System
Fixed by either the normal dowel or bolting methods (see NAMM’s Code Of Working Practice)
Base to Foundation and Ground
- i) Memorial Base: Two nuts are screwed separately onto the top of each of two threaded stainless steel dowels (Note: Type A – i.e. 16mm – are for memorials up to 900mm (36”) high, and type B – i.e. 20mm – are for memorials between 900mm (36”) and 1200mm (48”) with one nut just below the top of the dowel and approximately 20mm above the other.
Nuts and dowels are then fixed into two pre-drilled holes on the underside of memorial base – using a strong, non-locking, thread forming resin. These holes are 50mm (2”) in depth, 30mm (1¼”) in diameter with 350mm (14”) centres drilled on a line 100mm (4”) from the back edge of the memorial base. The positioning of the holes can be altered, but these dimensions will work with most base sizes – making memorial alignment simpler. This thread forming resin fixes the nuts securely but also allows the dowels to be unscrewed when the memorial is removed and then re-screwed at the grave side prior to fixing.
Note : it is important to ensure that the dowels have been screwed the full 50mm into the base otherwise they may not grip fully.
- ii) Foundation to ground: Hardstone (usually precast concrete), no less than 75mm (3”) thick, is precast or drilled with two holes of 30mm ( 1¼”) diameter, on a line 175mm (7”) from back – at 350mm (14”) centres, and set in the ground ready for the memorial. The two bell topped tubes are driven through the holes and into the ground using the tube locating tool. The tool is withdrawn when the top of the tube is flush with the top of the foundation.
N.B. NAMM code: if fixing near disturbed ground, a foundation which spans the grave should be used.
iii) Hard, difficult ground: If the ground is very stony, the locating tool can be used on it’s own first to make a pilot hole. If the ground is ever too hard for the tool a pilot hole would have to be drilled using a hammer drill.
Very Soft/loose ground: For this type of ground or where the memorial has
to be fixed directly onto a grave, Extension Tubes are available. These are driven, by means of the same locating tool, through the original tubes
after the latter have been set into place. The extensions must be driven in a minimum of 100mm (4”) and a maximum of 300mm (12”) Whether or not these are needed should be determined by the memorial mason at the time of fixing.
Memorial to foundation
The memorial base (with the two protruding threaded dowels) is located over the tubes and the threaded dowels are inserted inside them. No adhesive is used in the tubes, but the base and foundation are attached in the traditional manner with a suitable adhesive (e.g. Portland Cement)
If removal may be required at a later date, care should be taken to ensure that no adhesive enters the drilled holes, or locking may occur.
Memorials on Concrete Raft/Beams
For this type of foundation the kits consisting of two threaded rods and four nuts are used.
The memorial base is drilled as when using the full system.
The raft or beam is drilled with two 22mm (7/8”) diameter holes on a line 175mm (7”) from the back edge of the beam (or from the centre of the beam if the memorials are fixed back to back) at 350mm (14”) centres.
The memorial base with the two protruding threaded dowels is then located over the holes, so the dowels can be inserted into them and the base is attached in the traditional manner with a suitable adhesive (e.g. Portland Cement)
If removal may be required at a later date, cares should be taken to ensure that no adhesive enters the drilled holes, or locking may occur.
Reminder: individual dowel packs are available. Type A are for memorials up to 900mm (36”) high. Type B must be used for taller memorials up to a maximum height of 1200mm (48”) high. (For taller memorials the Association recommends setting memorials directly into the ground (see NAMM’S Code of Working Practice.
The NAMM Ground Support Memorial
Understanding the serious problems regarding public safety faced by UK Cemetery and Churchyard Authorities, NAMM set out to devise a safe, practical fixing system for lawn type memorials that fully addresses the issues – both in the long and the short term.
Following extensive research by the Association’s Technical and Traning Committee, the new system was developed under the watchful eye of Professor John Knapton of Newcastle University.
It consists of a simple kit of stainless steel bell-topped tubes and threaded locking rods, and is unique in that it is adaptable for use with rafts and concrete beams.
The beauty of the system is that it is simple to install, inexpensive to use and makes a memorial able to withstand well in excess of the minimum 70kg force (kgf) laid down in the Association’s Code of Working Practice, as recommended by Professor Knapton.
Professor Knapton ruled 70kgf to be more than the force exerted by two 14 stone people pulling themselves up on a memorial. (“More than adequate” according to one cemetery official who viewed the tests in action.)
Tel 01782 – 745533
Fax 01782 – 745555