Work Area Protection SMART CUSHION INNOVATIONS SCI100GM, Design & Installation Manual, Page: 6 / 60

2
SPECIFICATIONS
Description
The SMART CUSHION
®
is a re-directive, non-gating crash attenuator that consists of a base, supporting frames, a sled, side
panels, a wire rope cable, sheaves, and a shock-arresting cylinder. The base is anchored to the mounting surface and provides
support for the frames that are mounted on it. The support frames hold the side panels that provide a flat outer redirective surface
for side impacts. The sled provides redirective support for side impacts and deceleration force for frontal impacts. The SMART
CUSHION
®
telescopes rearward upon frontal impact and can be reset with minimal repair parts. It is NCHRP 350 approved at Test
Levels 2 and 3.
System Dimensions & Weight
SCI 70 GM SCI 100 GM
Width
24 inch (610 mm) 24 inch (610 mm)
Length 13 ½ feet (4115 mm) 21 ½ feet (6550 mm)
Height 33 inch (840 mm) 33 inch (840 mm)
Weight 2465 lbs. (1120 kg) 3450 lbs. (1570 kg)
NCHRP 350, Test Level
2 3
DESIGN CRITERIA
General
SMART CUSHION
®
impact attenuators comply with NCHRP Report 350, TL2 and TL3, and are designed for work zone and perma-
nent applications.
Foundations
Foundations must be a flat surface with longitudinal and cross slopes of 10:1 (horizontal: vertical) or less. SMART CUSHION
®
impact attenuators should not be located over drainage basins or expansion joints. Portland cement concrete foundation pads are
preferred for permanent installations; asphaltic concrete foundation pads are appropriate for work zone installations.
The following table describes the foundations that may be used. See Appendices for drawings.
Foundations
Pad Material and Thickness Anchor Embedment
6 inch (150 mm) reinforced PCC
1
5 ½ inch (140 mm)
8 inch (205 mm) non-reinforced PCC 5 ½ inch (140 mm)
3 inch (75 mm) AC
2,3
over 3 inch (75 mm) non-reinforced PCC 16 ½ inch (420 mm)
6 inch (150 mm) AC over compacted subgrade
3
16 ½ inch (420 mm)
8 inch (205 mm) AC
3
16 ½ inch (420 mm)
Notes: 1. Portland cement concrete 2. Asphaltic concrete 3. Minimum compaction: 95% of optimal