"Kamurjshin" Closed Joint-Stock Company was founded in 1971 as a bridge building organization of the USSR Transport Ministry specialized in the construction of big exclusive road and railway bridges. Within over thirty years of its activity “Kamurjshin” Joint-Stock Company built more than 100 big and small high-quality, big-scale bridges including: -Davtashen bridge in Yerevan, the length of the metallic span of which may reach up to 80 meters. All in all the length of the metallic bridge is 350 meters. -Nor Hachn two-storeyed bridge, the road runs on the upper floor and the railway is one storey lower. The length of the metallic span over Hrazdan river is 272.25 meters. -The bridge over the river Kasakh rounding Ashtarak city, the length of the metallic span of which is 210 meters (63+84+63). -The bridge of Stepanavan, the length of the metallic span of which is 189 meters (3x63). "Kamurjshin" Closed Joint-Stock Company produces the following reinforced concrete constructions: Preliminary strained slab-like traffic beams, their length reaches 18 meters, the height is 0.75 meters and the width is 0.94 meters. Preliminary strained traffic T-beams with length of 24 up to 28 meters, 1.12 meters height and 1.22 meters width of the slab. Non-preliminary strained T-beams with 9 up to 18 meters length, 0.7 -1.05 meters height, 1.3 -1.4 meters width of the slab. All the above mentioned constructions are used not only in the bridge building but also in the building of sporting complexes, swimming pools, parkings, etc. requiring big spans.
The characteristics of Davtashen bridge
• The length of the bridge is 496 meters • The bridge comprises 64+3x80+48 meters long metallic non-isolated span construction, 4x28 meters long reinforced concrete part and 15 meters long reinforced concrete span • The height above the water level of the river Hrazdan is 92 meters • The width of the bridge is 32 meters /3+26+3/ • The two piers are assembled from box-like, reinforced-concrete blocks 5x3.8x1.2 m and 35 cm thick which are made from B-40 class concrete. After being installed they have been preliminary strained • Combined reinforced concrete - 4690 cubic meters • Monolithic reinforced concrete - 9100 cubic meters • Metal - 4555 tons • Traffic part -15900 sq. meters



The characteristics of the bridges situated on Ijevan-Hrazdan railway
1^st bridge • The length of the bridge is 158 meters • The longitudinal scheme is 45+55+45 meters with metallic isolated spans • The height of the piers is 38 meters • Combined reinforced concrete - 850 cubic meters • Monolithic reinforced concrete - 3800 cubic meters • Metal - 650 tons 2^nd bridge • The bridge is 182 meters long • The longitudinal scheme is 3x45x33.6 meters with metallic isolated spans • The height of the piers is 40 meters • Combined reinforced concrete - 970 cubic meters • Monolithic reinforced concrete - 6400 cubic meters • Metal -1520 tons • The bridge is designed for two railroads

Ashtarak bridge
• The bridge is 368 meters long • The bridge comprises 3 metallic and 6 ferro-concrete spans. The length of the metallic span construction is 210 meters /63+84+63/ • The length of the ferro-concrete span construction is 144 meters /6x24/ • The height above the water level of the river Kasakh is 58 meters • The width of the bridge is 1.5+2x11.5+1.5 meters • The bridge piers are made from box-like blocks with 5x3.8x1.2 meters size which after being installed have been preliminary strained. The thickness of box-like reinforced-concrete block is 35 cm. • The piers of the ferro-concrete spans are made from empty piles • Combined reinforced concrete -1415 cubic meters. • Monolithic reinforced concrete - 8200 cubic meters • Metal - 2500 tons • Traffic part - 9620 sq. meters



Nor Hachn bridge
• The bridge is built over Masis-Nurnus railway, Hrazdan river gorge • The length is 640 meters • The length of the metallic part is 272.25 meters • The bridge comprises right-bank and left-bank parts, their length is correspondingly 13x12 meters and 16x12 meters • The height above the water level of the river Hrazdan is 121 meters • The width of the bridge is 1.5+11.5+1.5 meters • The distance between the sloping piers’ leaning points of the metallic span construction is 160 meters • The bridge is two-storeyed, the first storey is for the railway and the second is for the road • Combined reinforced concrete - 2800 cubic meters • Monolithic reinforced concrete -12800 cubic meters • Metal - 4650 tons • Traffic part - 9610 sq. meters


Stepanavan bridge
• The length of the bridge is 237 meters • The length of the metallic span construction is 189 meters /3x63/ • There is one 18 meters long reinforced concrete span on both sides of the bridge • The height above the river water level is 58 meters • The piers are made from box-like reinforced concrete blocks with 5x3.8x1.2 meters size • The width of the bridge is 23 meters /2+19+2/ • Combined reinforced concrete -1870 cubic meters • Monolithic reinforced concrete - 4560 cubic meters • Metal - 1210 tons • Traffic part - 5460 sq. meters
The characteristics of the bridge over the river Arax Situated between Islamic Republic of Iran and Republic of Armenia
• 3x63 type scheme reinforced concrete span constructions • The length is 207.72 meters • Bridge middle piers are on buried holes • All the metallic constructions make up 600 tons • Collapsible constructions - 1440 cubic meters • Monolithic reinforced concrete - 3630 cubic meters

"Kamurjshin" CJSC produces reinforced concrete constructions including premilinary-strained beams reaching 28 meters