Barricades installation

See also under Buildings and Other Structures at Ordnance Establishments in Vol 2, B320-R to B321-R, and Barricades in Explosives and Ammunition Installations in Vol 2, B22-R to B23-R... 

Natural Barricade. See under Barricades in Explosives and Ammunition Installations in Vol 2, B22-R. 

Because these barriers are not anchored into the roadway, they do not require excavation or other related construction for installation. In contrast, they can be assembled and made operational in a short period of time. The primary shortcoming to this type of design is that these barriers may move if they are hit by vehicles. Therefore, it is important to carefully assess the placement and anchoring of these types of barriers to ensure that they can withstand the types of impacts that may be anticipated at that location. Table 9.5 lists the pros and cons of portable/removable barricades. 

Installing portable barricades requires no foundation or roadway excavation. Portable barriers may move slightly when hit by a vehicle, resulting in a lower crash resistance. 

The installed barricades should not serve as an incubator for disaster by providing a small area for escaping volatile and explosive vapours to concentrate. This is a further aspect when designing a building for high-pressure processing must be taken into account. 

Barricades in Explosives and Ammunition Instal lotions. Barricades are required for protection of inhabited buildings, factories, magazines, railroads, highways, bridges, etc from explosions in installations in which expls or ammunitions are manufd, handled or stored. A barricade can be either natural such as a hill or timber of sufficient density) or artificial(s ich as a sand- or earth-filled embankment with a min width of 3ft... 

Einhabited Buildings occupied in whole or in part as a habitation for human beings or where people are accustomed to assemble FfBarricades, Natural and Builtup Installation Boundaries, etc. See Barricades in this vol as well as in Ref 2, seen 17, pp 24 32 and in Ref 3,pp 35 108... 

Motor Evaluation. Many different operations are performed in propellant and motor evaluation. The main safety precaution is to keep personnel contact to an absolute minimum. Most operations are performed remotely, the only contact required being during assembly and installation or removal of the test device. The most hazardous operation, test firings, are performed remotely in reinforced concrete barricaded cells (see figure 2). The technician who connects the ignition circuit, the last operation before firing, retains the key to the firing circuit such that it cannot be activated until he returns to the control room. 

Turnkey plant. Consists of all the hardware, software, technical data, and technical assistance necessary for the installation of a complete operating facility for the production of the commodity, a chemical substance, at defined production rates and to specified product qualities. Hardware consists of all the equipment, components, control valves, instruments, reaction vessels, feed lines, and exposition proof barriers necessary for the conduct of the unit operations of the overall production process, whether the items arc assembled or disassembled for transportation. The plant may be designed for installation at a prepared site that includes locally constructed and installed explosion-proof barricades... 

Standard that provides the requirements for the design and use of safety tags and barricade tapes and reflects harmonization with the international standards by permitting different colors to be used with the safety alert symbols that are a means of alerting people to temporary hazards often associated with construction equipment installation, maintenance, repair, lockout, or other transient conditions. Safety tags and barricade tapes are used to identify a temporary hazard. They should be used only until such time as the identified hazard is eliminated or the hazardous operation is completed. 

Personnel working with fluorine cylinders must be protected by use of a cylinder enclosure or barricade and remote control valves, preferably ones operated by manual extension handles passing through the barricade. The main function of a barricade is to dissipate and prevent the breakthrough of any flame or flow of molten metal, which, in case of equipment failure, could issue from any part of a system containing fluorine under pressure. Barricades of 0.25-inch (6.4-mm) steel plate, brick, or concrete provide satisfactory protection for fluorine in cylinder quantities. Adequate ventilation of enclosed working spaces is essential. Installation in a fume hood is recommended for laboratory use of fluorine cylinders. 

Protection of employees from loose rock or soil. Adequate protection shall be provided to protect employees from loose rock or soil that could pose a hazard by falling or rolling from an excavation face. Such protection shall consist of scaling to remove loose material installation of protective barricades at intervals as necessary on the face to stop and contain falling material or other means that provide equivalent protection. 

A rocker bomb charged under Ng with 3-diethylamino-l-propyne (prepn. s. 593), dicobalt octacarbonyl, and acetone, closed, cooled in Dry Ice-methanol, evacuated to ca. 5 mm, installed behind a heavy barricade, and heated ca. 16 hrs. at 125° under a CO-pressure of 600-1000 atm. N,N-diethyl-5-diethylamino-2,3-dihydro-3-furamide. Y 44%. F. e. s. J. C. Sauer, B. W. Howk, and R. T. Stiehl, Am. Soc. 81, 693 (1959). 

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