1. PRODUCT OVERVIEW VHM joint made by VinhHung Investment and Production Co., Ltd (VinhHung IP) are composed of multiple steel rails in combination with supporting beams and special structural accessories. VHM - modular expansion joint accomodates to longitudinal movement from 160mm and above. The expansion joints are connected to the bridge deck through the anchoring reinforced system. Rubber seal serves as drainage trough and protect the system from dust and debris. 2. PRODUCT CHARACTERISTICS : Design and manufacture according to AASHTOLRFD, TCVN 11823 â?? 2017 standards. : Allow longitudinal movement of up to 720mm, vertical and horizontal movements are in accordance with AASHTO standards. : Be able to withstand high load with stable and durable structure. : Ensure level and smooth surface for traffic. : Each center beam is fixed with an independent supporting bar, which satisfies the requirement of the fatigue limit C (AASHTO 2007). : Protected with high anti-corrosive coating layer and treated with anti-slip coating technology. : Totally watertight. 3. TECHNICAL PARAMETERS. MODEL DISPLACEMENT MM A C MM D H MM MM MM MIN MAX MIN MAX VHM - 160 160 160 320 360 40 200 350 VHM - 240 240 240 480 420 40 280 350 VHM - 320 320 320 640 500 50 370 350 VHM - 400 400 400 800 580 50 450 350 VHM - 480 480 480 960 640 60 540 350 VHM - 560 560 560 1120 700 60 620 350 VHM - 640 640 640 1280 800 60 700 350 VHM - 720 720 720 1440 880 60 780 350 4. PROPERTIES OF SEAL A. BEARING AND SPRING NO. ITEMS UNIT REQUIREMENT STANDARD 1 Hardness Point 60 �± 5 ASTM D2240 2 Tensile strength, min Mpa 15.5 ASTM D412 3 Elongation at break, min % 350 ASTM D412 4 Deformation in Ozone, (content of Ozone in the air: 100pphm, 20%. Deformation at 38�°C x 70h No crack ASTM D1149 5 Heat resistance (100�°C x 70h) Change of hardness, max Point 0~15 ASTM D573 Change of tensile strength, max % -15 Change of elongation, max % -40