StiroFert beams are constructed from profiled elements
made from polystyrene (15g/dm3), reinforced steel girders
and fine grounded concrete MB45.

StiroFert beams are placed on bearing supports, by the walls (CROSS SECTION B-B). These supports are consist of planks 2,5cm thick and minimum 20cm width, timbers (min 8x8cm) and steel shores (distance between shores are from 80 to 120cm). Extra bearing support are needed for light openings 5,0m width (in the middle of opening). Extra two rows of supports are mounting for light openings from 5,0 to 8,0 width. It is recommended to built in timbers (8x8cm), along the walls (CROSS SECTION A-A), parallel to StiroFert beams with steel supports (distance between these supports is 2,0m). For light openings over 5,0m supports in the field enables super elevation of the construction during mounting:

super elevation=light opening / 300

StiroFert beams are placed along each other, using rabbets.
Reinforcement Ø8 (RA 400/500) are placed across beams (distance between reinforement is 50cm),
steel lattice (minimum Q-131 (500/560)).

Floor plates for spans up to 7,0m are concreted using ordinary concrete MB 25 (min C20/25), while spans from 7,0 to 8,0m are concreted with MB 30 concrete (min C25/30). Concreting are taking place in one phase, when the ribs and plate are concreted simultaneous, or in two phases when they are concreted separately, one after another. In one phase concreting, the ribs are concreted first, and after that comes concreting plate in thickness 4,0cm with levelling with vibrato-batten and finishing by using „helicopters“. Floor lining are put directly on the top of concrete.

If concreting is manual and concrete are transported with carts, it is commended to put planks over polystyrene.

Beam characteristics

StiroFert beams are constructed from profiled elements made from polystyrene (15g/dm3), reinforced steel girders and finegrounded concrete MB45. StiroFert are built in longitudinal bearing reinforcement in any spans up to 10,4m and for loading up to 4,0kN/m2, according to Report IKH 989/08 by IMS Belgrade. If there are need for extra reinforcement, according to building project, we can build it in, too!

	COEFFICIENT OF THERMAL CONDUCTIVITY (k): HEIGHT OF POLYSTYRENE: WIDTH OF BEAMS: FINAL THICKNESS OF THE PLATE: SPAN: VOLUME OF FINE GROUNDED CONCRETE: WEIGHT PER m1: COCNRETE NEEDED ON BUILDING SITE: TOTAL WEIGHT OF FLOOR CONSTRUCTION:	0,40 W/m2 °C 15 cm 3 3,3 cm 15 + 4 = 19 cm do 5,3 m 0,0045 m3/m1 ˜12 kg 0,09m3 ˜ 230 kg/m2
	COEFFICIENT OF THERMAL CONDUCTIVITY (k): HEIGHT OF POLYSTYRENE: WIDTH OF BEAMS: FINAL THICKNESS OF THE PLATE: SPAN: VOLUME OF FINE GROUNDED CONCRETE: WEIGHT PER m1: COCNRETE NEEDED ON BUILDING SITE: TOTAL WEIGHT OF FLOOR CONSTRUCTION:	0,30 W/m2 °C 20 cm 33,3 cm 20 + 4 = 24 cm do 7,0m 0,0068 m3/m1 17 kg 0,087 m3 ≈270 kg/m2
	COEFFICIENT OF THERMAL CONDUCTIVITY (k): HEIGHT OF POLYSTYRENE: WIDTH OF BEAMS: FINAL THICKNESS OF THE PLATE: SPAN: VOLUME OF FINE GROUNDED CONCRETE: WEIGHT PER m1: COCNRETE NEEDED ON BUILDING SITE: TOTAL WEIGHT OF FLOOR CONSTRUCTION:	0,25 W/m2 °C 25 cm 33,3 cm 25 + 4 = 29 cm do 8,4m 0,0068 m3/m1 17 kg 0,107 m3 ≈320 kg/m2
	COEFFICIENT OF THERMAL CONDUCTIVITY (k): HEIGHT OF POLYSTYRENE: WIDTH OF BEAMS: FINAL THICKNESS OF THE PLATE: SPAN: VOLUME OF FINE GROUNDED CONCRETE: WEIGHT PER m1: COCNRETE NEEDED ON BUILDING SITE: TOTAL WEIGHT OF FLOOR CONSTRUCTION:	0,19 W/m2 °C 30 cm 50,0 cm 30 + 5 = 35 cm do 10,4m 0,0100 m3/m1 30,0 kg 0,12 m3 ≈350 kg/m2