Improving Mobility on the Farm or Ranch Robert Stuthridge B.Sc., M.Sc. Ergonomist National AgrAbility Project Purdue University West Lafayette, IN.

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Presentation transcript:

Improving Mobility on the Farm or Ranch Robert Stuthridge B.Sc., M.Sc. Ergonomist National AgrAbility Project Purdue University West Lafayette, IN

Agenda Importance of mobility Barriers to mobility Possible improvements and solutions Discussion

Importance of mobility lossesA farmer/rancher who does not have relatively easy access to crops, livestock, and facilities can experience losses due to inadequate supervision of their operation. competitive disadvantageThese losses represent a competitive disadvantage. quality of lifeThere are also quality of life issues involved.

Barriers to mobility Attention in urban settings to improving access: –Curb cuts –Elevators –Lifts –paved walkways –ramps Problematic in farming/ranching – different terrain types in varying weather conditions.

Barriers to mobility Farmers with mobility problems have to deal with: –Long distances between work sites

Barriers to mobility Farmers with mobility problems have to deal with: –Growing crops/vegetation

Barriers to mobility Farmers with mobility problems have to deal with: –Surface materials not suited to good mobility

Barriers to mobility Farmers with mobility problems have to deal with: –Uneven/sloping terrain

Barriers to mobility Farmers with mobility problems have to deal with: –Fences and gates

Barriers to mobility Farmers with mobility problems have to deal with: –Buildings and other structures

Barriers to mobility Farmers with mobility problems have to deal with: –The weather

Possible improvements and solutions Personal Mobility Aids Limitations: Personal mobility aids alone cannot resolve every problem. E.g. wheelchair in deep mud. May need a combination of personal mobility aids and site improvements How far we go depends on feasibility finances wishes of the farmer demands of the job.

Personal Mobility Aids Manual wheelchairs: Pros Lightweight manual wheelchairs (e.g. ‘sports’ models) are: Easily maneuverable Require less energy to move compared with standard- weight chairs Wheelchairs designed for off- road use, (e.g. Invacare Crossfire All-Terrain) may suit farmers best.

Personal Mobility Aids Manual wheelchairs: Cons Manual wheelchairs less useful for long distances or unaccommodating ground. In bad weather - hand rims may be slippery. For better traction in snow, baler twine can be used like tire chains - easily cut off when not required.

Personal Mobility Aids Lever propulsion manual chairs Lever propulsion manual chairs e.g. Jouleflow Blade Drive (1 or 2 handed propulsion) and Wijit (2 handed) eliminate rim use. Click image for Jouleflow video

Personal Mobility Aids Manual wheelchairs: Other considerations Mag/alloy or spoke rims? - Alloys are lighter - spoke rims provide better shock absorption. Solid or pneumatic tires? -Weight, shock absorption, - puncture resistance. Tire liners to resist punctures? - Plastic/Kevlar liners: but reduce shock absorption - Polyurethane foam: lightweight, good shock absorption

Personal Mobility Aids Powered wheelchairs Not all powered chairs are suited to farms Look for: high torque all wheel drive (ideally) adequate ground clearance tires for rough terrain shock-absorbing seat suspension armrests all weather seats Power sources: battery/electric – allowed in public buildings but may not offer long range (solar power ‘charge on-the-go’ system) Gas – greater range but prohibited in public buildings Magic Mobility X8 Frontier Tracabout IRV 2000 CadWeazle

Personal Mobility Aids Standing wheelchairs Enable user to adopt standing posture. 1.Helps with some tasks, including workshop activities. 2.Improves viewing over obstructions/fences. 3.Improves blood flow - may offer other health benefits. The Standing Company Superstand

Personal Mobility Aids ATVs Compared with powered wheelchairs: 1.Have longer range 2.Cope with most terrain/conditions 3.Faster 4.Carry passengers and/or materials 5.Can power implements (mainly towing)

Personal Mobility Aids Trucks Almost ‘standard equipment’ on most farms. May be fitted with powered lifts. May be adapted for hand control of all functions.

Possible improvements and solutions Site improvements – main aspects 1.Planning routes 2.Ramps and lifts 3.Gates 4.Substrates

Site improvements Planning routes Distances traveled between buildings? Orientation of doorways and provision of alternative access points? Sheltered route? Use existing paved routes?

Site improvements Ramps and lifts Choose either lift or ramp, with features and construction materials to suit each situation. Ideally comply with ADA Standards for Accessible Design. Retain steps, where feasible: Ramps not ideal for some people with walking impairments. Lifts may suffer breakdown or power failure.

Site improvements Gates Automatic – solar powered Can open gates up to 20’ and weighing up to 1,000 pounds. Trickle charge battery operation using 10w or 20w solar panel.

Site Improvements Substrates Incompatibility of wheelchairs and soft substrate. Solution may involve changes to wheelchair, substrate, or both. Changes to the wheelchair: 1.Fitting high flotation tires. Reduce sinking. 2.Use a wheelchair with high ground clearance and high grip tires. 3.Use a foam or air cushion to reduce shocks to the spine.

Site Improvements Changes to the substrate. Common solutions: 1.Retain and compact substrate. Reduce voids using different grades of material, then pressure/vibratory compaction. Routine re- compaction may be necessary. 2.Pave using concrete or asphalt. 3.Reinforce the substrate structure using resin/chemical binders. 4.For soft earth, stabilize using a cellular confinement system immediately beneath the substrate surface, which is then grassed over, e.g. ‘TuffTrack’ or GrassPave 2 5.Provide a stable synthetic surface over unstable substrate. Porous pavement panels, e.g. GeoBlock, or rolls. If unchecked, vegetation will grow through such systems. TuffTrack System. NDS, Inc. TRACK-GRASS-ROAD-PAVERS.html TRACK-GRASS-ROAD-PAVERS.html GeoBlock. Soil Stabilization Products Company, Inc.

Site improvements Substrates: Route hardening Crushed stone or decorative gravel: Pros 1.Material and maintenance cost is low 2.Surface is suitable for both pedestrian and vehicular use 3.Porous, reducing or eliminating risk of storm water run-off. Cons 1.Small, thin wheels sink and act as brakes - muscular strain risk increased. 2.Material may lodge between hand rim and tire, causing hand injuries. 3.Coarse stone increases roughness of the ride. May be rendered stable and more accessible for wheelchair users by installing a porous pavement system e.g. Gravelpave2

Discussion