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IENG 471 - Lecture 09

Personnel Planning - Parking

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Assignments

Current Assignment: HW 5: Team Assignment, 2 people per team, turn in 1 HW set per team.

b.) assume separate restrooms, industrial facility (non-foundry) and assume they want minimal space increase

Next Assignment: Prep for Exam II Parking Lot Problem, 2 people per team – see last slide

for today Measuring tools are in the MIL Lab (IER 310) on the South blue pegboard

Return the tools ASAP Layout the parking lot according to the handout heuristic Show your work (for your OWN benefit) Put this on EP paper for your use on the second exam and keep it in your

engineering notebook. Exam dimensions and design constraints may be similar, but different. Good idea to clearly document what you did, so you can adapt your model

for the exam quickly.

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Parking Lot Design

Goals vary depending on Facility purpose Examples:

Airport Regional Hospital Home Improvement Store Supermarket (no drive up) Manufacturing Plant College Campus (commuter school) College Campus (pedestrian mall) Military Base

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Parking Lot Design

General Rules of Thumb:1. Local zoning regulations tend to be more restrictive, and

supersede most guidelines (they may also be negotiated)2. OSHA / other standards may (indirectly) impact lot design3. 500 feet is usually the maximum walking distance for

regular patron access to the facility4. 2% to 5% of capacity are Handicapped accessible spaces5. 33% of spaces are allocated to compact cars6. Increased area for parking decreases time for parking & de-

parking (increases parking spot turns)7. Angular configurations increase parking spot turns8. Perpendicular parking often increases lot space utilization9. Required aisle space increases with the parking angle10. Vehicle sizes change over time

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Parking Lot Design

Steps of Lot Design Heuristic:1. Determine the number of vehicles to be parked

2. Determine the space required for each vehicle type

3. Determine the available space for parking

4. Generate alternative parking layouts for alternative parking patterns (lots may have alternative uses)

5. Select the best layout to maximize space utilization and regular patron convenience

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Using the Parking Design Tables

Recommendations for Stall Widths (Table 4.1 from Parking Lot Design Handout link on Materials Page)

Small car use: 7.5 to 8 feetAll-day parker: 8 to 8.5 feetStandard car: 8.5 to 9 feetLuxury/elderly: 9 to 10 feetSupermarket: 10 to 11 feet

(also campers)Handicapped: 11.8 to 12.2 feet

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Using the Parking Design Tables

Parking Module Widths (See top of Parking Lot Design handout from Materials Page)

Three Module Groups (relates stall width, module width, parking angle) G1: Small Cars G2: Standard Cars G3: Large Cars

Four Module Types (gives width of module, including aisle) W1: Single Loaded, Wall-to-Wall W2: Double Loaded, Wall-to-Wall W3: Double Loaded, Wall-to-Centerline W4: Double Loaded, Centerline-to-Centerline

Parking Width (PW) is based on Parking Angle (θ) and Stall Width (SW):

Used to find the requiredlot depth

)sin(SW

PW

θSW

PW

SD

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Maximized Utilization Heuristic Steps

Align Module Width to Lot Width Layout using largest parking angle possible, preferring W4

modules to maximize space utilized per module Layout remaining space with largest W module that can be

accommodated, and then use largest parking angle possible Reduce space in least efficient module to accommodate

handicap or special case allocations, if allowable Reduce spaces available at aisle ends for required cross-

aisles and lot entrances / exits Use Parking Width and remaining module lengths to compute

the total number of vehicles accommodated

Align Module Width to other lot dimensions and repeat (best orientation might be neither perpendicular nor parallel)

Select the “best” of the layout options

Questions & Issues

Exam II Parking Lot Design Problem (prepare ahead for exam!): Measure the IER parking lot AND the gravel area to the East for:

Location of utilities, side walks, building entrances & walls – considering them to be Monuments

Monuments are things that cannot be removed or relocated – like pillars

Dimensions to the nearest foot (rounding down) Assume curb cuts, sign posts & foliage can be moved

Assume the width of the level part of the curb cut is the same as the width of a cross aisle (if any cross aisles are needed)

Using the Parking Lot Design handout, design the most efficient lot possible if the strategy for the lot is to allow quick turnover, and:

90o parking must use the stall width midpoints, others can use smallest stall widths 2% of the stalls are handicapped accessible (use largest stall width) 10% of the stalls are for compact vehicles 10% of the stalls are for large vehicles Bumpers can overhang the sidewalks to the South and East, but not the West Bumpers cannot encroach on the alley, or the garbage truck will hit them!

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