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support suitable for the intended load shall be provided. <br />The backbone of the support system shall be the chassis frame rails which is the strongest <br />component of the chassis and is designed for sustaining maximum loads. <br />The entire support system shall be stainless steel. <br />The support system shall include steel vertical angle supports bolted to the chassis frame <br />rails. <br />Attached to the bottom of the steel vertical angles shall be horizontal angles, with gussets <br />welded to the vertical members, which extend to the outside edge of the body. <br />A steel frame shall be mounted on the top of these supports to create a substructure which <br />shall result in a 500 lb equipment support rating per lower compartment. <br />The substructure shall be separated from the horizontal members with neoprene elastomer <br />isolators. These isolators shall reduce the natural flex stress of the chassis from being <br />transmitted to the body. <br />Isolators shall have a broad load range, proven viability in vehicular applications, be of a <br />failsafe design and allow for all necessary movement in three (3) transitional and rotational <br />modes. <br />A design with body compartments hanging on the chassis in an unsupported fashion shall n <br />be acceptable. <br />AGGRESSIVE WALKING SURFACE <br />All exterior surfaces designated as stepping, standing, and walking areas shall comply with <br />the required average slip resistance of the current NFPA standards. <br />LOUVERS <br />Louvers shall part of compartment walls to provide the proper airflow inside the body <br />compartments and to prevent water from dripping into the compartment. <br />TESTING OF BODY DESIGN <br />Body structural analysis shall be fully tested. Proven engineering and test techniques such as <br />finite element analysis, stress coating and strain gauging shall be performed with special <br />attention given to fatigue, life and structural integrity of the cab, body and substructure. <br />Body shall be tested while loaded to its greatest in-service weight. <br />The criteria used during the testing procedure shall include: <br />- Raising opposite corners of the vehicle tires 9.00" to simulate the twisting a truck may <br />experience when driving over a curb. <br />- Making a 90-degree turn, while driving at 20 mph to simulate aggressive driving <br />conditions. <br />- Driving the vehicle at 3 5 mph on a washboard road. <br />- Driving the vehicle at 55 mph on a smooth road. <br />- Accelerating the vehicle fully, until reaching the approximate speed of 45 mph on rough <br />pavement. <br />51 <br />