seafarer's center parking lot
TRANSCRIPT
SEAFARER’S CENTER PARKING LOT Mah-rukh Muhammad, Project Engineering Intern
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PROJECT: SEAFARER’S CENTER PARKING LOT
By Mah-rukh Muhammad
What: Car/light truck parking lot
Location: Adjacent to the Seafarer’s Center
Manage:
o Scope development
o Cost estimating
o Surveying
o Subgrade/sub base
o Asphaltic pavement section design
Drainage
Parking stops
Striping
Proposal preparation
Utilize
o C=Constructability
o A=Availability
o M=Maintainability
o E=Environmental
o O=Operations
o S=Security
o S=Safety
End Product:
o Design drawings and sketches of the parking lot design
Parking lot should have 16 spots
o Technical specifications suitable for PHA maintenance to
construct the parking lot
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PROJECT PLAN:
Draw the parking lot on AutoCAD
o utilize the UH standard angles and spacing
o utilize the Parking Design Manual
o draw the parking lot utilizing 16 spaces
o draw the parking lot using measured maximum allowed
spaces
Obtain parking lot dimensions through AutoCAD
o Verify distances with survey
Make sure that ADA relegations are followed
o Slope
o Handicapped spaces
Obtain asphalt and base quantity without Geotextile or Geogrid
o Analyze geotechnical report
o Find out the liquid limit and California bearing ratio
o Use the information in the Parking Lot Design Manual to
verify and confirm numbers found in geotechnical report
Consult with Tencate to find out which Geotextile suits location
needs and obtain pricing on it for given dimensions
Consult with Tensar to find out which Geogrid meets
specifications and obtain pricing on Geogrid for given dimensions
o Schedule a meeting with Tensar Regional Manager to
discuss product options for the project
Obtain prices on the silt fence with given dimensions
o Best management plan from Environmental Department
Calculate how much base and asphalt is needed with Geogrid
Calculate much base and asphalt is needed with Geotextile
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Contact maintenance vender
o obtain cost of asphalt and base with Geotextile
o obtain cost of asphalt and base with Geogrid
o obtain cost of asphalt and base without either
Find out additional cost factors
o Car stops
o Paint
o Expansion joints
Create final cost summary of min and max parking spaces
Create comparison matrix of all parking lot design combinations
Analyze costs and benefits of all options to provide
recommendation
Meet with CAMEOSS Team
Update results
Meet with maintenance department to initiate bid document
o Maintenance:
Silt fence, car stops, paint
o Bid Package:
Asphalt, crushed aggregate, geotextile
Create bid document or make work order with maintenance
department
o Survey control document
o Detail and Cross Section drawings
o Parking Lot General Layout Drawing
o SWPPP Details
Create informal bid for geotextile material
Project completed once all is in place for parking lot at seafarer’s
center to be built
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Contents PROJECT PLAN: ..................................................................................................................................2
Parking Lot Design..............................................................................................................................5
Spacing Dimensions........................................................................................................................5
Design............................................................................................................................................6
Parking Lot Dimensions ..................................................................................................................6
Regulation Compliance.......................................................................................................................8
No Geotextile or Geogrid....................................................................................................................9
Parking Lot Design ..........................................................................................................................9
Geotechnical Report Information.................................................................................................. 11
Geogrid............................................................................................................................................ 12
Geotextile........................................................................................................................................ 13
Quantity Comparison ....................................................................................................................... 15
Final Cost Summary.......................................................................................................................... 16
Recommendation:............................................................................................................................ 17
Cross Section ................................................................................................................................... 23
References:...................................................................................................................................... 24
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Parking Lot Design
Spacing Dimensions
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Dimensions
Stall width: 8.5 feet
Curb length: 9.8 feet
Stall depth: 19.8 feet
Stripe length: 22.9
feet Aisle width: 24
feet
Section width: 63.6 feet
Angle: 60 degrees
Design
Parking Lot Dimensions 22 feet by 168 feet 3109.655 Square Feet
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16 Parking Spaces 19 Parking Spaces
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Regulation Compliance
ADA
Parking Spaces: 4.6.3 Accessible parking spaces shall be at least 96 in wide. Parking access aisles
shall be a minimum of 60 in wide and must be part of an accessible route to the building or facility entrance. Two accessible parking spaces may share a common access aisle. Parking spaces and access aisles shall be level with surface slopes not exceeding
1:50 (2%) in all directions.
PARKING STANDARDS AND REQUIREMENTS
17.27.040 Parking design and construction requirements.
G. Grades. The maximum slope of a parking facility shall be six percent. The minimum slope shall be one
and one-half percent.
Handicapped Space Requirement: Met
Slope requirement:
Slope is calculated to be 1.55%
Slope Requirement is Met
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No Geotextile or Geogrid
Parking Lot Design
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Geotechnical Report Information Study conducted by Aviles Engineering Corporation of the Seaman’s Church
Institute
Tests performed
o Atterbergs limit
o Moisture content
o No. 200 sieve analysis
Site conditions: flat and covered with gravel and sand pavement
Result:
o Top 10 feet of soil are of low to high plasticity with liquid limits ranging
from 31 to 71 percent
o Placticity indices range from 15 to 44 percent
o Asphaltic concrete pavement
o No slope stability evaluation performed
o Top 6 to 24 inches of subgrade soils are generally dense gravel and silty
sand
Design procedure:
o AASHTO Road Test:
Recommendation:
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Geogrid
Tensar® TriAx® (TX) Geogrids
Tensar® TriAx® Geogrid is an advanced product specifically designed for
trafficked surfaces. TriAx Geogrid’s multi-directional properties leverage
triangular geometry, one of construction’s most stable and widely utilized
shapes, to provide an enhanced level of in-plane stiffness. Its triangular
structure, coupled with improved rib and junction geometry, offers the
construction industry an improved alternative to conventional materials and
practices.
TriAx Geogrid is manufactured from a punched polypropylene sheet
oriented in multiple, equilateral directions to form its triangular apertures,
resulting in high radial stiffness throughout the full 360 degrees. This feature
yields a more efficient product that delivers optimal in-service stress
transfer from the aggregate to the stabilizing geogrid.
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Geotextile
One of the primary functions that geosynthetics used in road construction provide is tensile stress relief at the bottom of the base course layer and across the top of the subgrade surface.
Without using geosynthetics, these tensile stresses will cause tension cracks to develop in the bottom of the base course.
Due to dynamic traffic loads these cracks allow fines from the subgrade to migrate upward into the base course layer while base course aggregate simultaneously migrates downward into the subgrade.
The net effect of all this particle movement is to reduce the strength and overall thickness of the base course due to fines contamination from the bottom-up.
Strength loss in the base course progresses as the number of cracks, and the width and depth of the cracks increase over the life of the roadway.
This beneficial tensile stress relief can be accomplished using geotextiles and geogrids with high tensile modulus values at low strains (i.e. 1%, 2%) and high frictional capacities.
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TenCate Mirafi RSI Series VS. TenCate Mirafi X Series
Note: The price for TenCate Mirafi RSi series is higher than the TenCate Mirafi X Series($379 vs. $1700)
Recommendation:
The TenCate Mirafi RSi Series is recommended rather than the TenCate
Mirafi X Series
o The TenCate Mirafi RSi Series has filtration, reinforcement,
confinement, and drainage in addition to separation.
o The TenCate Mirafi RSi Series will reduce the base course by 30%, as
recommended by TenCate engineer.
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Quantity Comparison
Quantity Asphalt Crushed Aggregate
No Geotextile/grid Ton 60 tons 190 tons
With Geogrid Ton 45 tons 135 tons
With Geotextile Ton 60 tons 127 tons
Asphalt Crushed Aggregate
Price $63 per ton $25 per ton *Price calculated using Century Asphalt
QUANTITY Asphalt Crushed Aggregate
No Geotextile/Geogrid 2.5 inch 8 inch
Geogrid 2 inch 6 inches
Geotextile 2.5 inches 5.6 inches
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Final Cost Summary
16 Parking Spaces
COST Asphalt Crushed Aggregate GeoGrid FilterFabric
Silt Fence
Car Stops and Paint TOTAL
No Geotextile/Geogrid $3,780 $4,750 0 0 $80 $126 $8,736
Geogrid $2,835 $3,375 $1,274.50 0 $80 $126 $7,690
*Geotextile $3,780 $3,175 0 $1,700 $80 $126 $8,861
19 Parking Spaces (the maximum possible)
COST Asphalt Crushed Aggregate GeoGrid FilterFabric
Silt Fence
Car Stops and Paint TOTAL
No Geotextile/Geogrid $4,489 $5,641 0 0 $80 $126 $10,335
Geogrid $3,367 $4,008 $1,274.50 0 $80 $126 $8,855
*Geotextile $4,489 $3,770 0 $1,700 $80 $126 $10,165
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Recommendation:
Seperation Filtration Reinforcement Confinement Drainage Life Cycle Cost SUM
No Geotextile/Geogrid 2 2
Geogrid 2 1 3 6
*Geotextile 1 1 1 1 1 2 1 8
Recommendation:
o Use a geotextile with the asphalt and crushed
aggregate base for this parking lot.
o This will include 2.5 inches of asphalt and 5.6
(approximately 6) inches of crushed aggregate
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CAMEOSS Meeting Conclusion:
Spacing should be adjusted to 90 degrees instead of
60 degrees.
If:
The parking spots won’t get too close to the ditch
Recommendation of 2.5 inches of asphalt and
about 6 inches of crushed aggregate was approved.
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After drafting the revised parking lot, results were:
Factors Noted:
Parking is not too close to ditch
Increase in parking spaces
Increased safety when leaving the parking spot
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Decision:
Change the angle of the parking spots to 90 degrees.
Post CAMEOSS Meeting Decision:
Use a geotextile with the asphalt and crushed aggregate base for this
parking lot.
This will include 2.5 inches of asphalt and 5.6 (approximately 6)
inches of crushed aggregate
Adjusted Area: 153 feet by 18 feet
3519 sqft
COST Asphalt Crushed Aggregate Geotextile
Silt Fence
Car Stops and Paint TOTAL
$4,278 $3,592 $1,700 $80 $153 $9,803
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Additional Suggestion through observation:
90 Degree Parking Lot Double Lined
*Cost Estimate would be approximately the same as single lined above due
to cost decreased from area and increased from paint
Parking Lot Area: 191 feet by 18 feet, 3438 square feet
Line striping: (42 lines * 18) + 191= 947 feet in striping
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Survey Control
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Cross Section
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References:
Design Reference:
University of Houston Campus Design Guidelines and Standards,
Parking Lot Design Standards
Asphalt Parking Lot Guide by PAIKY
ADA Parking Standards
Flexible Pavement Design using TenCate Mirafi® Geosynthetics
Price Estimates:
Tensar
TenCate
San Jancinto Environmental Supplies
Century Asphalt