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