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Chapter 3: The Tool 15 3.4 Worksheet 3, Characterization Figure 4 shows a view of Worksheet 3, Characterization. The columns in this worksheet pro- vide descriptions of each GSM listed in Rows 11 to 112. Column E,"Notes," describes each GSM, and Column F, "Options and Variations of GSM," describes some of the common variations for each GSM. Step 3 (see Figure 1) requires the following: Look up (in Column A) the GSM numbers recorded on your short list (in a file or on paper) for further evaluation. Review the characterization information to determine if any GSM should be removed from the short list. A GSM should be removed from consideration either because the measure has already been implemented or because the measure cannot be reasonably implemented for technical reasons. Examples of conditions that may cause exclusion of some options include ground surfaces entirely covered by asphalt or concrete, which would prevent effective use of buried fiber optic intruder sensors; or limited space, which could prevent construction of efficient earthen barriers. Note that cost should not be considered at this stage of the evaluation. You may edit Columns C through F to describe more specific GSMs as needed. A B C D E F G H 1 CHARACTERIZATION OF GSM 2 3 INSTRUCTIONS: For data edits only! DO NOT SORT on this page!! 4 The columns below provide descriptions of each GSM listed in rows 11 to 112. For each GSM # on your paper list of GSMs for further evaluation (developed from the sorts 5 performed on Sheet 2 "Valuations"), review the characterization information provided below. You may edit Columns C through F to describe more specific GSMs as needed. 6 Use GSM # (Column A) to quickly find GSMs at the top of your list. 7 8 GSM CHARACTERIZATION More GSM Info. 9 # Method Category GSM Notes Options and Variations of GSM (Ref.) 10 1 Fencing / Retractable Ramp/ Wedge, May be certified anti-ram vehicle barriers that have been tested to either Manual or automatic raising and lowering; some 5, 6, 54 Barriers Vehicle in-ground mounted Department of State (DOS), U.S. Navy, or U.S. Marshall Service products rated as high as DOS K12/ L3. Deterrents specifications, the later two of which are often converted to DOS ratings. K 11 ratings indicate kinetic energy (determined from speed and weight), L ratings 2 Fencing / Retractable Bollards, indicate the extent of penetration beyond the barrier. K and L ratings of Hydraulic, electro-hydraulic, or manual retraction into 5, 6, 54 Barriers Vehicle retractable speed and penetration described below are for a 15,000 lb vehicle with impact ground. Some products rated as high as DOS K12/ L3 12 Deterrents (steel or concrete) perpendicular to the barrier: depending on installation. 3 Fencing / Retractable Ramp/ wedge, K4 -- 30 mph L1 -- 20 to 50 feet Manual or automatic operation. Chain reinforcements 5, 6, 54 Barriers Vehicle surface mounted K8 -- 40 mph L2 -- 3 to 20 feet increase anti-ram capability, but substantially lower anti- Deterrents K12 -- 50 mph L3 -- less than 3 feet ram ratings than in-ground mounted ramps (listed 13 separately). 4 Fencing / Retractable Booms and Crash Manual, automatic, or portable. Range from minimal anti- 6, 54 Barriers Vehicle Beams ram capability to DOS K4/L2 or higher. Deterrents (sliding or swing gates) 14 5 Fencing / Retractable Traffic controllers Traffic controllers are not certified anti-ram barriers. They can be penetrated Spring-mounted to allow safe one-way travel, or 5 Barriers Vehicle ("tire teeth") by vehicles with puncture proof tires. Under some circumstances a vehicle retractable (with access control) to allow two-way travel. Deterrents with standard tires may penetrate a significant distance after it's tires are Wrong-way penetration distance can be reduced with 15 shred. low speed conditions. 6 Fencing / Fixed Vehicle Bollards, May be certified anti-ram vehicle barriers have been tested to either Variable anti-ram capability. Some products rated as 5, 6, 59 Barriers Deterrent, fixed/stationary Department of State (DOS), U.S. Navy, or U.S. Marshall Service high as DOS K12/ L3 depending on installation. Pedestrian (concrete or steel) specifications, the later two of which are often converted to DOS ratings. K Access ratings indicate kinetic energy (determined from speed and weight), L ratings indicate the extent of penetration beyond the barrier. K and L ratings of speed and penetration described below are for a 15,000 lb vehicle with impact perpendicular to the barrier: K4 -- 30 mph L1 -- 20 to 50 feet K8 -- 40 mph L2 -- 3 to 20 feet 16 K12 -- 50 mph L3 -- less than 3 feet 7 Fencing / Fixed Vehicle Decorative Crash- Crash-rated decorative furniture, bike racks, and planters are typically Wide variety of aesthetic options, metal or concrete. 7, 8 Barriers Deterrent, Rated Barrier mounted on crash rated bollards or steel posts. Trees are rated based on Variable anti-ram capability. Some products rated as Pedestrian (spheres, benches, trunk diameter. Branches and leaves can reduce observation and video high as DOS K12/ L3 depending on installation. Access bike racks, trees, etc.) monitoring ability. 17 8 Fencing / Fixed Vehicle Jersey Barriers, Jersey barriers are often used as temporary barriers, They are grouped here Various styles, lengths, shapes, colors, can be arranged 5, 59 Barriers Deterrent, portable as a "fixed vehicle-deterrent" because they typically provide a temporary end-to-end, or in multiple rows, and anchored to Figure 4. View of Worksheet 3, Characterization.