the exterior surface of the test specimen at a operation. The device also needs to withstand minimum rate of 5.0 US gal/ft2-hr. The the rough handling and abuse of a acceptable tolerance for the device ranges construction environment while maintaining from 4-10 US gal/ft2-hr. functionality. Because the device will be regularly exposed to water, all the device Improved Portability and Usability parts need to be corrosion resistant. The ease of use of the water penetration testing device relies upon required Aesthetics manpower, setup time, and transportation. The water penetration testing device should The device should be assembled, transported, have a neat and professional appearance. and operated by one person unless it is being Other key details include hardware that is used in suspension which would require two consistent in appearance throughout the people. The assembly or disassembly of the rack. spray device should take a maximum of 5 Top-Level Alternative Conceptual Solutions minutes. Most of the parts need to be stock After brainstorming possible design ideas, the and easily replaceable in case they break or team evaluated three final design solutions. malfunction. Finally, it is important that the A circular rack, flexible tubing rack, and a device is able to be transported via a compact square modular rack were compared to the passenger car, eliminating the need for a current Morrison Hershfield model in the truck/utility vehicle. scoring matrix in Table 1 below. The square modular rack accumulated the highest score. Structural Integrity The structural integrity of the water Table 1: Decision matrix for 3 possible design solutions. penetration testing device maintains that it will withstand the stresses acting on it during Rack Rack operation. The spray device must be Hershfield Modular Rack Tubing structurally sound when standing on the PDS Criteria ground or in suspension. This ensures the Morrison Square Flexible Circular 3 4 5 5 Portability safety of the users and other individuals 3 4 3 4 Ease of Use 2 4 2 4 Maintenance within the proximity of the device during 2 4 2 2 Durability
the exterior surface of the test specimen at a minimum rate of 5.0 US gal/ft2-hr. The acceptable tolerance for the device ranges from 4-10 US gal/ft2-hr. Improved Portability and Usability The ease of use of the water penetration testing device relies upon required manpower, setup time, and transportation. The device should be assembled, transported, and operated by one person unless it is being used in suspension which would require two people. The assembly or disassembly of the spray device should take a maximum of 5 minutes. Most of the parts need to be stock and easily replaceable in case they break or malfunction. Finally, it is important that the device is able to be transported via a compact passenger car, eliminating the need for a truck/utility vehicle. Structural Integrity The structural integrity of the water penetration testing device maintains that it will withstand the stresses acting on it during operation. The spray device must be structurally sound when standing on the ground or in suspension. This ensures the safety of the users and other individuals within the proximity of the device during operation. The device also needs to withstand the rough handling and abuse of a construction environment while maintaining functionality. Because the device will be regularly exposed to water, all the device parts need to be corrosion resistant. Aesthetics The water penetration testing device should have a neat and professional appearance. Other key details include hardware that is consistent in appearance throughout the rack. Top-Level Alternative Conceptual Solutions After brainstorming possible design ideas, the team evaluated three final design solutions. A circular rack, flexible tubing rack, and a square modular rack were compared to the current Morrison Hershfield model in the scoring matrix in Table 1 below. The square modular rack accumulated the highest score. Table 1: Decision matrix for 3 possible design solutions. PDS Criteria Morrison Hershfield Square Modular Rack Flexible Tubing Rack Circular Rack Portability 3 4 5 5 Ease of Use 3 4 3 4 Maintenance 2 4 2 4 Durability 2 4 2 2
Rain%20Rack%20-%20Final%20Report.docx