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Chris Buckler Christina Harris Greg Strimel Elizabeth Surgeon
Trucks accumulate large amounts of snow and ice, causing severe safety concerns for all drivers.
There are an estimated 15.5 million trucks operating in the U.S., of which 2 million are tractor trailers Source: Trucking Statistics Source: Clip Art
Flying ice from tractor trailers has been documented to cause serious safety issues Source: Ramirez, M.
Benefits of removing ice and snow: ◦ Improved visibility ◦ Prevents injury or property damage ◦ Prevents laws and fines ◦ Improved fuel economy ◦ Reduce insurance claims & law suits ◦ Meet OSHA regulations for truck drivers Source: Trego, T. Source: /detail.html /detail.html
Removal of ice and snow accumulation from the tops of semis creates challenges Some solutions, such as having drivers climb onto the roof and manually removing snow and ice causes serious safety issues, including falling. Other methods can be more complex, require routine maintenance, or be cost-prohibitive Source: Trego, T. Source: ilylocal.com/content/articles/20 10/03/21/business/srv jpg
The build-up of snow and ice on top of a tractor trailer can significantly increase the height and weight of the truck, causing major problems Source: Snow, ice make tractor-trailers over weight. Source: snow.jpg snow.jpg
Inflatable Lifting System Two-Man Hand Tool One-Man Hand Tool
Design Matrix Rating 123 Problem WorstAverageBest Trucks accumulate large amounts of snow and ice causing severe safety concerns for all drivers Criteria Ideas Cost Effectiveness Ease of Installation Height Weight Availability of Materials User Friendly Practicality Effectiveness of Snow Removal Time to Build Does not Damage Truck Appearance Safety Simplicity Durability Total Heated Coil Bubble Winch Device Heated Blanket Two Man Hand Tool Roof Shape Portable Drive Thru Hydraulic Roof Lift Conveyor Belt Hand Roof Lift
Best Solution IdeasMember 1Member 2Member 3Member 4Total Heated Coil Bubble Winch Device Heated Blanket Two Man Hand Tool Roof Shape Portable Drive Thru Hydraulic Roof Lift Conveyor Belt Hand Roof Lift Top 3 Ideas IdeaTotal Two Man133 Hand Tool129 Bubble128
Costumer RequirementsEngineering Specifications Cost effective The device needs to be designed to cost less than a fine that could be received from not removing snow in some states. Fines range from $75 to $200. The device will be cheaper than possible law suits from damages or injuries from this issue. Easy to install Trucking companies and truckers do not want to spend extra time that could be used being productive. The device must be designed to require minimal time to apply and use. The trailer should not have to be completely altered. Height to pass through tunnel The device must be designed to not add height to the truck so that it can pass through tunnels and overpasses. The device must be able to collapse with minimal effort. The minimal tunnel height on the edges is 13'10". The height of trailers are up to 13' 6". Does not add weight to truck The legal maximum weight for an eight-wheeler is 40 tons. They weigh about 30,000 lbs on average when emptied
Costumer RequirementsEngineering Specifications Practical Will the device actually be able to be used by trucking companies? The design should not have to change all trailers that are already out there. It must be in compliance with state laws and regulations. Effective in clearing snow The design must actually remove all snow and ice. Does not damage truck The design must not cause any damage to the truck in any way. The trailer of the truck should not have to be completely altered. Appearance The materials selected to be used for the device must be of quality to ensure a device that is wanted to be used. Safe When designing the device it must be safe for the operator and for everyone around the truck. A safety manual is a must. Durable The materials selected must be of a quality that allows long time use of the device. The materials must balance longevity and price. The material must withstand brutal winter weather.
Glad Hand Coupler Two Glad Hand Couplers on Trailer Lip on Top of Trailer Air Hoses Under Trailer Chris next to Trailer
Air Tank on Trailer Air Couplers on Cab Air Hose on Trailer PSI Pressure Gauge Air Hoses on Cab
Surface Area of Trailer = in 2 Trailer length = 48 ft = 576 in Trailer width = 102 in Area = Length X Width = 576 in X 102 in = in 2 Specific weight of 32 F = X = 0.04 Volume of water equivalent on trailer = Surface area of trailer X Height of water = in 2 X 1.2 in = in 3 Weight of water to lift = Specific weight of water X Volume of water on trailer = 0.04 X in 3 = 2821 lb. Pressure Required = Weight of water to be lifted = = 0.05 or psi Surface area of trailer For a safety factor of 2 (designed to lift two times as much snow as we feel necessary) = 0.1psi
Function Form Ergonomics Durability Standardization Aesthesis Cost
BEST SOLUTION DESIGN CRITERIA Criteria CategoryDesign Criteria Function Inflate to beak up ice and snow Inflate to slide snow off the side of truck Inflate to a dome type shape Inflate from truck’s air supply Inflate by attaching an air hose or turning on a switch Must be able to collapse
BEST SOLUTION DESIGN CRITERIA Criteria Category Design Criteria Form The device must not significantly affect the height of the truck. Trailer heights are up to 13'6". Pass under minimum tunnel height at the edges of 13'10" The device must not significantly effect the weight of the truck. Maximum weight of trailer is 80,000 lbs. Weight of trailer empty is 30,000 lb Fit Trailer length 48' Fit Trailer width 102" Must inflate with a compressor of at least a filling rate at 13 cubic feet per min at 35 psi Semi-cylinder volume of device 2,353, in³ Device must be inflatable Must fit the area of trailer top 58,752 in² Device must be made of non-stick material Device must attach to the glad hand seal that connects the trailer to the cab
BEST SOLUTION DESIGN CRITERIA Criteria CategoryDesign Criteria Ergonomics The device must be designed to allow 2 people easily to place it on top of a trailer from a catwalk or be placed by a forklift The device must be of light weight to ensure that it can be moved by two people. The air hose and glad hand coupler are designed to allow easy attachment and detachment to air hose connection. They are created to be used with one hand with a simple turn of the wrist Air hoses and coupler devices are designed to allow easy replacement and repair by operator The device must be designed to allow 2 people to remove and store during summer
BEST SOLUTION DESIGN CRITERIA Criteria CategoryDesign Criteria Durability Material should be able to be repaired by patch kits Material should be air tight Material should be pliable and workable under negative 30 degree Fahrenheit temperatures Material needs to be resistant to UV rays Materials need to be abrasive and puncture resistant Materials needs to be water tight Inert material to resist a variety of chemicals Materials need to be heat and chemical welded to ensure an air tight and strong attachment points
BEST SOLUTION DESIGN CRITERIA Criteria CategoryDesign Criteria Standardization The manufacturing of the device must be able to be replicated. A proper design will allow the material to be mended together in a way that is consistent AestheticsThe device must not hinder the appearance of the trailer Cost The cost of the device must be designed to be under the price of the fine caused by the offense of not removing snow. Fines range from $75-$200. Law suits from accidents and workers compensation can be greatly expensive.
Paper ModelCompressor Model Preliminary Sketch - Bubble Preliminary Sketch - Coupling
Adjust the shape of the inflatable ◦ Inflate chamber down the middle first ◦ Include a rigid structure down the middle Use a stronger material ◦ Thicker plastic Pulsating air supply ◦ Could be accomplished through valves or computer control Conduct testing in a cold environment (below freezing) ◦ Walk-in freezer Teflon coating ◦ Use Scotchgard instead of cooking spray
Proposed material - nylon coated polyurethane ◦ Waterproof and airtight ◦ UV and chemical resistant ◦ Puncture and tear resistant ◦ Workable and pliable in cold temperatures ◦ R/F and chemically bonded for strength ◦ Smooth, slippery surface ◦ Can be custom cut to fit any pattern Inflated by air compressor already on truck Source: materials-construction.php materials-construction.php
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