The $2019$ Parking Structure Design Guidelines by Kimley Horn provide some minimum dimensions for several helix configurations without specifying the assumed parking geometrics or ramp slope. The purpose of this assignment is to determine the minimum dimensions for various helix configurations using a variety of parking geometrics.

Choose one of the following circulation configurations:

Two$-$way single threaded helix with a single sloped floor;

Two$-$way single helix with two sloped parking floors, similar to Prospect Garage;

Four$-$bay, side$-$by$-$side helix with a central two$-$way parking ramp and one$-$way drive aisles, similar to South Garage; and

Four$-$bay, side by side helix with a central two$-$way no parking ramp and one$-$way drive aisles.

For your chosen circulation configuration, develop two equations, one for the minimum width and the other for the minimum length of the parking area. These equations will not include the dimensions of the structural elements, except for the depth of the floor, which you can assume to be $2$ ft$.$ Assume appropriate parking geometrics $($stall width, length, parking angle, aisle width$).$ Assume an appropriate vertical clearance $(7$ ft is minimum, $8-9$ ft is typical, $10$ ft is large$)$ and an appropriate ramp slope. For parking ramps, choose a value between $5$ and $6\mathrm{.}5\%.$ For non$-$parking ramps, choose a value between $12$ and $15\%.$ Using your selected variable values, and your equations, calculate the minimum width and length, and the area of one tier $($i$.$e$.$ length x width$).$

Using MicroStation $($or another CAD package$),$ draw a functional design for one tier of your chosen circulation configuration using your selected variable values. Draw the parking stalls and include arrows on the aisles and the ramp to indicate the direction of traffic flow. The standard minimum outer turning radius is $24-0.$ The minimum clear distance $($i$.$e$.$ width$)$ through a turn is $14-6$ for one$-$way aisles and $26-6$ for two$-$way aisles. Do not show details such as vehicle entrances or exits or stairways. Determine the number of parking stalls and calculate the parking efficiency. Recall that the parking efficiency is the area of the tier divided by the number of parking spaces on the tier, and has the units, square foot per parking stall.

Submit the following:

Equations for the minimum width and minimum length. All variables must be defined and include units.

Calculation of the minimum width and minimum length. All variable values must be shown in the equations and the final answer must include units.

Calculation of the parking efficiency. Include the details of the calculations so that the values for the number of parking stalls and floor area for one tier are clear.

Functional design for one tier printed to pdf using ANSI A$.$ Provide dimensions to indicate the chosen parking geometrics, the outer turn radius and clear distance for each turn, and the minimum width and length. Indicate the ramp slope, number of parking stalls, area of tier, and the calculated parking efficiency.