Standard carpentry work is set up on the bed all around the columbarium, for the height of the niches. A wooden beam with the same thickness as the concrete to be poured is placed in correspondence to every vertical wall, both on front and rear part.; these beams are connected with through rods tightened by clamps in order to counter the thrust of the concrete.
The formwork is supplied 10cm longer than the niche so that the part in excess is fixed between the vertical beams.
SETTING UP THE FORMWORK
A. arbloc formwork is covered with a polyethylene bag to prevent the concrete from adhering to the polystyrene. The polyethylene bag is open on two sides to facilitate and speed up covering the form again after every concrete pouring.
B. The front of the polyethylene bag is stretched and fastened with adhesive tape.
C. The formwork is turned on a side, then the two flaps are overlapped and fastened.
D. The bag is fastened on the bottom.
CONCRETE POURING
We recommend using fluid concrete and to start pouring on the top part of the formwork and then fill the walls. The floor slab is levelled with the required slope towards the inside.
According to Ministerial Decree of 09/01/1996, in order to obtain quality concrete slabs, there must be a minimum depth of iron coverage according to the Exposure Class. Cemetery niches are included in Class 5 relative to chemically aggressive environments, and such class in turn is divided into three sub-classes as follows:
a) Lowly aggressive environment
- iron coverage 25mm -
b) Moderately aggressive environment
- iron coverage 30 mm -
c) Highly aggressive environment
- iron coverage 40 mm -
EXTRACTING THE FORMWORK
The formwork is removed with an extractor, as of the day after pouring. The extractor is an hydraulic electric machine supplied on hire with the formwork. The fork is hooked to the eyebolt with arms placed over the boards in correspondence to the slabs (see picture 1) in order to prevent the pressure from damaging the concrete. Extraction is accomplished by making the form slide thirty to forty cm out of the polyethylene bag. The operation is then completed by hand (see picture 2). The extractors have been constructed according to the pertinent safety standards. Each machine is certified with the CE marking and is equipped with an emergency pushbutton installed directly on the fork where the controls are located. The forks are height adjustable and weigh approx. 34 kg.
SETTING UP THE CARPENTRY
A. arbloc formwork is covered with a polyethylene bag to prevent the concrete from adhering to the polystyrene. The polyethylene bag is open on two sides to facilitate and speed up covering the form again after every concrete pouring. 
B. The front of the polyethylene bag is stretched and fastened with adhesive tape. 
C. The formwork is turned on a side, then the two flaps are overlapped and fastened. 
D. The bag is fastened on the bottom. 
CONCRETE POURING
