Roads are of utmost importance in the economic development of a country and bridges as connectives of these lifelines should be given the highest priority. Various bridges fabricated in M.S.A
1- M.S.A type bridges 1-1) Composite plate girder bridges 1-2) Emergency truss bridges 2) Special projects 2-1) Arch bridges 2-2) Continuous composite plate girder bridges 2-3) Composite box girder bridges 2-4) Special truss bridges 2-5) Railway bridges 2-6) Cable Stayed bridges 2-7) Steel Structures 2-8) Power plant equipment Composite girder bridges (M.S.A type) General specifications: Span: 15 to 60m with 5m increments Width: 5m with 2.5m increments+2 1.5m Sidewalks in each side Loading: According to No. 139 publication of the Technical affairs and standard preparation office (Management and planning organization of Iran) Material: ST37-2 for 15 to 25m spans and ST52-3 & ST37-2 for 30 to 60m spans according to DIN 17100 Fittings: Main fittings from high strength hexagon head bolts according to DIN 6914 with nuts Acc. to DIN 6915 and washers Acc. to DIN 6916 Design standard: AASHTO Truss bridges (M.S.A type)
General specifications: Type one: Span: 12m up to 45m with 3m increments Height: 3.3m Type two: Span: 48m up to 60m with 3m increments Height: 6.6m Type Three: Span: 75m and 81m Height: 8m Truss bridges carriageway width are 5m, and
Type two and three truss bridges are roofed. Loading: According to No.139 publication of the technical affairs and standard preparation Office (management and planning organization of Iran) Material: High strength weathering steel Acc.to EN10025-5 (S355J2W+N) Fitting: Bolts Acc. to DIN 7999 with nuts Acc. to DIN 6915 & washers Acc. to DIN 6916 Bridge deck: Pre-fabricated steel Design standard: AASHTO Special feature: Easy and fast erection by launching device, without cranes or welding operations in site, makes it especially suitable and effective for emergencies.
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