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 MIL-HDBK-1013/14
Table 7
Cable-Reinforced Crash Beams Available From Delta Scientific
Model
TT212
TT212E
Height, inches (cm)
30 (76) to 36 (91)
30 (76) to (91)
Length, inches (cm)
120 (305) to 240 (610)
120 (305) to 240 (610)
Normal operating cycle (seconds)
8 to 15
8 to 15
Emergency operating cycle (seconds)
Not available
Not available
Kinetic energy absorbed in impact
0.108 (0.014)
0.410 (0.056)
testing, ft-lbf (kgf-m) x one million
Kinetic energy rating by engineering
0.410 (0.056)
NA
analysis, ft-lbf (kgf-m) x one million
(destruction of vehicle with some
damage to barrier)
Barrier cost, $ x one thousand for a
5 to 10
5 to 10
single system. Optional items are
extra.
Installation cost as a percentage of
15
15
equipment cost
E = Enhanced; NA = Not Available
8.1.4.2
Testing. This barrier was tested by the NFESC at the China Lake test facility. A
10,000-pound (4,545-kg) vehicle at 17 mph (27 kph) impacted the barrier (TT212) and rebounded.
8.1.5
Delta Scientific Linear Crash Gate System
8.1.5.1
Description. Delta Model TT280, shown in Figure 15, is a sliding gate that offers
pedestrian access and resistance to heavy vehicle impact. It is electromechanically operated with a
30-(9 m) to 100-(30 m) foot per minute sliding speed (instantly reversible). Safety infrared sensors
and front edge obstacle sensors are standard features. Gate systems are normally used where
esthetics is an issue or where wide opening is required [up to 25-foot (7.6 m) clear opening].
Performance and cost data are shown in Table 8.
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