Work Area Protection SMART CUSHION INNOVATIONS SCI100GM, Design & Installation Manual

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6
INSTALLATION
Installation and Performance Statements
Proper performance within these limits depends on correct installation of the SMART CUSHION
®
on an approved foundation.
Any SMART CUSHION
®
not installed according to the drawings and the requirements of this installation manual may present an
unsafe condition and should be reinstalled accordingly.
Impacts with vehicles whose size or mass are outside of those tested according to NCHRP 350 or with vehicles traveling at
speeds greater than those tested according to NCHRP 350 will not necessarily produce results within the test criteria. The crash
cushion is in conformance with all requirements of NCHRP 350 Levels 2 & 3 but is not guaranteed to safely stop a vehicle in a
situation not encompassed by the test conditions.
Safety
All work during installation, repair and inspection of the SMART CUSHION
®
should be performed according to feder-
al, state and local laws.
Equipment List
See Appendix B
Site Preparation
Check to make sure there are no drains, expansion joints, or buried conduit, cables or utility lines in the footprint space where the
attenuator will be placed. Remove any curbs >4 inch or obstacles in front of or beside where attenuator will be installed for a min-
imum distance of 12 feet from any edge of the attenuator. Be sure to set up proper traffic control before beginning any installation
or repair work at the site.
Foundations
– (reference Appendices E1 and E2)
New foundations should be installed according to Appendix E – Foundation Drawing. Concrete should reach full cure strength
before use. The surface of the foundation must be cleaned of all debris, dirt, mud, sand, etc., as the crash cushion must sit on a
level plane, although longitudinal and/or cross slope of up to 10:1 (horizontal:vertical) is allowed.
Any of the following foundations will meet the minimum requirements:
•
6 inch reinforced concrete pad
•
8 inch non-reinforced concrete pad
•
3 inch asphalt over 3 inch of concrete
•
6 inch asphalt over 6 inch of compacted sub base
•
8 inch asphalt
Note: Concrete should be 28 MPa or 4000 psi minimum at full cure. The slope should not exceed 10:1.