HOUSTON INDEPENDENT SCHOOL DISTRICT Essential Functions and Physical Demands Analysis Job Details Job Title: Bus Mechanic Helper Job Code: Date of Analysis: 11/5/03 Department: Transportation (Delmar Service Center) Job Analyst: Benjamin Haynes, OTD Summary of Essential Functions The Bus Mechanic Helper with Houston Independent School District is required to perform the following essential functions during the course of a normal workday: 1. Responsible for receiving work orders from the Lead person in the department. 2. Responsible for servicing buses. 3. Responsible for responding to road service calls for buses out on routes in the Houston Independent School District. 4. Responsible for recording completed work in work logs for each bus serviced. Product /Workplace Descriptions The work of a Bus Mechanic Helper with Houston Independent School District is performed in a school district involved primarily in the education of school-aged children and students grades Kindergarten through twelfth grade. The specific department in which the duties are performed is the Transportation department. More specifically, the work of this Bus Mechanic Helper takes place at the Delmar Service Center. The Bus Mechanic Helper is responsible for receiving work orders from the Lead person or Foreman at the Delmar Bus Service center. The worker is responsible for completing maintenance and service work on bus tires, various brake components, radiators, airconditioning units, heating units, batteries, starters, and other components on HISD buses. This worker is not responsible for completing engine work or other associated heavy bus mechanic work. There are no pits or heavy-duty bus lifts available at the Delmar Bus Service center. Therefore, all rebuilds of bus starters, alternators, carburetors and engines are contracted out or completed at other HISD service centers. The Bus Mechanic Helper works directly with the Bus Mechanic. The Helper could be considered HISD - Bus Mechanic Helper 1 9/26/2009
an understudy of the Bus Mechanic, but the physical requirements of the job are the same. Tire Manipulations The peak force required to overcome inertia to lift up (pull) on one side of a 295, 75R, 22.5 tire is 125.8 pounds. This lift is completed using bilateral upper extremities with supinated forearm rotation initially, and then one supinated, one pronated, or one neutrally rotated arm when the tire is moved into an upright position. The tire is rolled from one spot to another after it is moved into an upright position. The peak force required to overcome inertia to lift up (pull) on one side of a recapped 11R, 22.5 tire is 149.1 pounds. This lift is completed using bilateral upper extremities with supinated forearm rotation initially, and then one supinated, one pronated, or one neutrally rotated arm when the tire is moved into an upright position. The tire is rolled from one spot to another after it is moved into an upright position. These two peak forces are required to lift up on a tire that is laying flat on the ground in order to move the tire to place it on a bus or do other associated repair work on the tire. The Bus Mechanic Helper begins these lifts by squatting or stooping beside the tire and then placing the hands under one side of the tire. Battery Compartment Manipulations The peak force required to pull out the battery compartment tray is 90.9 pounds. This pull is completed using neutral forearm rotation with bilateral upper extremities. This pull is completed with the hands using a modified power grip around handles on each side of the tray, 22 inches above the ground, with the worker squatting. The peak force required to push in the battery compartment tray is 107.7 pounds. This push is completed using bilateral upper extremities in pronated forearm rotation with extended wrists 22 inches above the ground. Bus Hood Manipulations The peak force required to overcome inertia when opening the hood of a bus that is not spring loaded is 59.4 pounds. This push force is completed using neutral or supinated forearm rotation with extended wrists and starts at 48 inches above the ground with the elbows flexed and moving into elbow extension and shoulder flexion. The peak force required to pull down on a bus hood to close it is 98.8 pounds. This pull is completed 48 inches or higher above the ground. This pull is completed using neutral forearm rotation with the hands gripping the side of the hood with a power grip. The hood of the bus is pulled and allowed to fall down with the assistance of gravity. The newest models of buses owned by the HISD have bus hoods that are spring loaded. These forces were measured on older model buses that are encountered occasionally. Weights of objects used by Bus Mechanic Helper The weight of the largest starter used by this Bus Mechanic Helper is 46.5 pounds. The starter is lifted using a neutral or supinated grip pattern. The weight of the largest brake drum used by this Bus Mechanic Helper is 110.5 pounds. The weights of bus batteries used by this mechanic are 60.9 pounds and 58.7 pounds. These batteries are lifted using HISD - Bus Mechanic Helper 2 9/26/2009
a neutral grip by grasping a plastic handle that loops across the top of the battery. The weight of a bus radiator used by this Bus Mechanic Helper is 51.8 pounds. The weight of a bus spring used by this mechanic is 105.2 pounds. The work of a Bus Mechanic Helper with Houston Independent School District is performed indoors and outdoors in a school system environment. Temperature and humidity levels vary dependent upon the weather. The Delmar Bus Service Center is located in a large bus depot station. The ground is covered with gravel and asphalt. The worker must be able to endure the elements in order to successfully complete job related tasks and activities. The worker is at times able to work under a covering that would protect him/her from the elements. At other times, no covering is available. Tools and equipment used in this Bus Mechanic Helper include, but are not limited to the following: 10-ton hydraulic air hoists (to raise the bus when changing tires, brake components), bus transmissions, bus brake components, bus starters, bus tires, bus radiators, air impact tools (wrenches, hammers, etc ), various hand tools, bus tire racks, pry bars, creeper (rolling tray used by worker to lay on back and work on undercarriage of the bus) and heating/air-conditioning components. The HISD owns buses made by Chevrolet, Ford, Freightliner, Bluebird, Thomas, and Amtran. Regular, dependable attendance is an essential function of this position. HISD - Bus Mechanic Helper 3 9/26/2009
HOUSTON INDEPENDENT SCHOOL DISTRICT Physical Demands Analysis Summary Page Position Title: Bus Mechanic Helper Department: Transportation Date of Analysis: 11/5/03 SITTING/STANDING/WALKING Sitting Standing Walking Crawling Constant (67-100%) Worker s Ability Yes No Peak Forces Involved in Work Processes Force measurements were taken of various activities requiring strength in the performance of the Bus Mechanic Helper duties for this position. Force takes into consideration the average velocity and/or acceleration of the lift and the effort necessary to overcome inertia. Other factors taken into consideration are the necessary strength to grasp and perform manipulative activities that have an associated strength factor. Worker s Ability ACTIVITY PERFORMED PEAK FORCE AVERAGE Yes No Force required to overcome inertia to lift up on one 149.1 pounds side of a recapped 11R, 22.5 tire Force required to overcome inertia to lift up on one 125.8 pounds side of a 295, 75, 22.5 tire Force required to push in the battery compartment 107.7 pounds tray Force required to pull down on a bus hood 98.8 pounds Force required to pull out the battery compartment 90.9 pounds tray Force required to push up when opening the hood of a bus that is not spring loaded 59.4 pounds Lifting Activities Note: All lifting activities cover both lifting and lowering processes. The point of origin and/or the destination of the lift are classified in the three body zone ranges. The weight ranges given are the weight of the product to be lifted or lowered and does not include the force to be employed in the lifting process. Frequencies are calculated based upon the number of lifts and lowers, the average time of each lift, and then divided into the total time in the workday. LIFTING LEVEL FLOOR TO WAIST 0-10 pounds 10-20 pounds 20-50 pounds 50-70 pounds 70 + pounds Total Floor to Waist Lifts Constant Worker s Ability (67-100%) Yes No HISD - Bus Mechanic Helper 4 9/26/2009
LIFTING LEVEL WAIST TO SHOULDER 0-10 pounds 10-20 pounds 20-50 pounds 50-70 pounds 70 + pounds Total Waist to Shoulder Lifts Constant Worker s Ability (67-100%) Yes No LIFTING LEVEL ABOVE THE SHOULDER 0-10 pounds 10-20 pounds 20-50 pounds 50-70 pounds 70 + pounds Total Above Shoulder Lifts Constant Worker s Ability (67-100%) Yes No Constant (67-100%) Worker s Ability UPPER BODY ND* Dom. Both ND* Dom. Both ND* Dom. Both YES NO Pushing Pulling Carrying Handling Grip Strength - Neutral Grip - Pronated Grip - Supinated Grip Pinch Strength - Key/Lateral - Palmar - Tip Fingering Feeling Reaching Below Knees Reaching Knee to Shoulder Reaching Above Shoulder LOWER BODY REQUIREMENTS Kneeling Crouching/Squatting Stooping Stair/Ladder/Climbing Balancing Crawling Constant Worker s Ability (67-100%) Yes No HISD - Bus Mechanic Helper 5 9/26/2009
OTHER PHYSICAL DEMAND REQUIREMENTS Correctible Vision Uncorrected Vision Color Vision Talking Hearing Smell Constant Worker s Ability (67-100%) Yes No HISD - Bus Mechanic Helper 6 9/26/2009
HOUSTON INDEPENDENT SCHOOL DISTRICT Physical Demand Analysis Job Title: Bus Mechanic Helper Department: Transportation Prepared By: Benjamin Haynes, OTD Date of Analysis: 11/5/03 Essential Function 1: Responsible for receiving work orders from the Lead person in the department. Required Physical Demands Reaching Knees to Shoulder Handling Function Description: The Bus Mechanic Helper receives work orders from the Lead person or the Foreman in the department. The worker is directed as to what work orders must take precedence and what work must be completed. Work includes both preventative maintenance and emergency maintenance tasks and activities. Description Grip Strength - Neutral Grip Required to grasp paperwork/work orders. Fingering Required to manipulate paperwork. Pinch Strength - Lateral Pinch Required to manipulate paperwork. - Palmar Pinch Required to manipulate paperwork. - Tip Pinch Required to manipulate paperwork/grasp a writing utensil. Correctible Vision Talking Hearing Required to communicate with supervisors and other mechanics in the department. Required to communicate with supervisors and other mechanics in the department. HISD - Bus Mechanic Helper 7 9/26/2009
Essential Function 2: Responsible for servicing buses. Function Description: The Bus Mechanic Helper is responsible for completing both preventative maintenance and emergency maintenance tasks and activities on the fleet of buses owned by the HISD. The Bus Mechanic Helper at the Delmar Service Center is not responsible for completing heavy mechanic work, such as engine work. The worker is responsible for completing brake component work, servicing tires and wheel components, installing starters, radiator work, and heat and air-conditioning work. The worker must be able to lay on his/her back when working on the undercarriage of the bus. The worker must also be able to maintain varying body postures to successfully complete work. All body postures were rated at occasional because all are required and used to complete work related tasks and activities. Required Physical Demands Standing Walking Sitting Stair/Ladder Climbing Balancing Lifting Description this essential function. this essential function. this essential function. At times, when bus components are pulled out of the bus, the Bus Mechanic Helper is able to sit at a workbench to complete work related tasks and activities. this essential function. At times, the worker is required to stand on a stepladder or the wheel well of the bus to complete work under the hood of the bus. this essential function. Required when standing on a stepladder. Also required when rolling tires and when carrying heavy bus components. this essential function. Required to lift tools and equipment that can weigh up to 120 pounds. The weight of the largest starter used by this Bus Mechanic Helper is 46.5 pounds. The weight of the largest brake drum used by this Bus Mechanic Helper is 110.5 pounds. The weights of bus batteries used by this mechanic are 60.9 pounds and 58.7 pounds. The weight of a bus radiator used by this Bus Mechanic Helper is 51.8 pounds. The weight of a bus HISD - Bus Mechanic Helper 8 9/26/2009
spring used by this mechanic is 105.2 pounds. Carrying this essential function. Required to carry tools and equipment of various weights in the service center and also out into the bus yard. Pushing this essential function. Required to push up on the hood of the bus at a force of 59.4 pounds. Also required to push in the battery compartment tray at a peak force of 107.7 pounds. Pulling this essential function. Required to pull up on one side of bus tire (11R, 22.5 tire at 149.1 pounds; 295, 75R, 22.5 tire at 125.8 pounds). The peak force required to pull out the battery tray is 90.9 pounds. The peak force required to pull down the bus hood on a bus that is not spring loaded is 98.8 pounds. Stooping this essential function. Required when pulling on one side of a bus tire to move it from one place to another. Also required when removing/replacing a bus tire. Kneeling this essential function. Required when working on components of the bus low to the ground. Crouching this essential function. Required when pulling on one side of a bus tire to move it. Also required when working on the battery tray of the bus. Crawling this essential function. The Bus Mechanic Helper is responsible for working on his/her back on a creeper. Reaching Below Knees this essential function. Reaching Knees to Shoulder this essential function. This body zone is where most reaching takes place. The worker will generally alter body position in order to center him/herself at the level where work takes place. Reaching Above Shoulder this essential function. Handling this essential function. Handling is very important for the Bus Mechanic Helper. The worker is required to handle various tools, equipment and bus components that are described in this report. Grip Strength - Neutral Grip this essential function. Required when handling tools. Also required when pulling out battery compartment tray. - Supinated Grip this essential function. Required when lifting tools and equipment. A supinated grip is also required at times when gripping an air impact wrench when removing bolts on wheels. - Pronated Grip this essential Fingering function. this essential function. Required when working with small components, such as wiring. Also required when feeling components of the bus. Pinch Strength - Lateral Pinch this essential HISD - Bus Mechanic Helper 9 9/26/2009
function. Required to manipulate small components and parts of the bus, such as nuts, bolts and screws. - Palmar Pinch this essential function. Required to manipulate small components and parts of the bus, such as nuts, bolts and screws. - Tip Pinch this essential function. Required to manipulate small components and parts of the bus, such as nuts, bolts and screws. Correctible Vision this essential function. Color Vision this essential function. Required to distinguish between different types of wiring used in various bus components. Talking Required to communicate with co-workers. Hearing Smell Required to communicate with co-workers. this essential function. Required to detect burning odors when servicing buses. Essential Function 3: Responsible for responding to road service calls for buses out on routes in the Houston Independent School District. Function Description: The Bus Mechanic Helper is responsible for responding to emergency road service calls from Bus Drivers in the HISD. The worker is required to travel to the site of the bus and determine what the problem is with the bus. The worker would use the same types of weights, push and pull forces as previously described. The worker is generally required to change a tire that is flat when these calls come in to the service center. Required Physical Demands Standing Walking Sitting Stair/Ladder Climbing Lifting Carrying Pushing Description Required to sit in the cab of a vehicle to drive to the site of the bus. When changing a tire, required to lift a pry bar, power tools, and tire rack. Required to push a new tire onto the tire mount when changing the tire HISD - Bus Mechanic Helper 10 9/26/2009
on a bus. Pulling Required to pull a tire of the tire mount when changing a tire on a bus. Required to pull up on one side of bus tire (11R, 22.5 tire at 149.1 pounds; 295, 75R, 22.5 tire at 125.8 pounds). Stooping Kneeling Crouching Reaching Below Knees Reaching Knees to Shoulder Reaching Above Shoulder Handling Required to manipulate tires/tools. Grip Strength - Neutral Grip Required to handle tools. Also required to steady a tire that is rolled on the ground. - Supinated Grip Required to pull up on one side of a tire. - Pronated Grip Required to steady a tire that is rolled on the ground. Pinch Strength - Palmar Pinch Required to manipulate bolts used to hold tires on wheel mount. Correctible Vision Talking Required to communicate with Bus Drivers who place emergency service calls. Hearing Required to communicate with Bus Drivers who place emergency service calls. HISD - Bus Mechanic Helper 11 9/26/2009
Essential Function 4: Responsible for recording completed work in work logs for each bus serviced. Function Description: The Bus Mechanic Helper is responsible for completing paperwork that tracks any maintenance that is completed on all individual buses owned by the HISD. Required Physical Demands Sitting Reaching Knees to Shoulder Handling Description Required to sit at a desk or computer terminal. Required to manipulate paperwork/writing utensil. Grip Strength - Neutral Grip - Pronated Grip Required to grasp a computer mouse. Fingering Required to manipulate a computer keyboard. Pinch Strength - Lateral Pinch Required to manipulate paperwork. - Palmar Pinch Required to manipulate paperwork. - Tip Pinch Required to manipulate paperwork. Also required to grasp a writing utensil. Correctible Vision HISD - Bus Mechanic Helper 12 9/26/2009