CASE STUDY RESEARCH PAPER- REPORT ( 48 Hours - A+ Score Required)
jhayes
2.CONE-Presentation.pptxIbrahim Alsaeed #32
CONE-430
Summer2017
Professor Hossein Hemati
Pendry Hotel
General Contractor: Davis Reed Owner: Robert Green Company Project Cost: $105 million Project Duration: 27 months Start Date: October 8th 2017 Finish Date: March 2019
Building Features
Pendry Hotel San Diego will feature:
317 guest rooms, including 36 suites
A rooftop pool
Two uniquely-designed restaurants
A regional micro-brew beer hall
6,200-square-foot state-of-the-art spa/fitness facility
Over 30,000 square feet of meeting space
Subterranean parking in three stories below grade
Site Logistics and Layout
The project is located in the Gaslamp Quarter of downtown San Diego
The project sits on a 1 ½ acre site, this area also includes the pedestrian sidewalk which was annexed into the project
The Gaslamp Quarter Association only allows construction to occur from the hours of 7 am to 5 pm
Location of project outlined in red
Site Layout Continued
Site Layout 4/22/18
Site Layout Diagram
Comat pc 300 Excavator Cycle Time Data
Cycle Time:
load bucket 6 Seconds
Actual load 6*0.35= 2.1 seconds
Swing time load 4 Seconds
Actual Swing 4*1.67= 6.7 Seconds
Empty bucket 3 Seconds
Swing time empty 4 Seconds
Actual Swing empty 4*1.67= 6.7 Seconds
Theoretical Cycle time 18.5 Seconds
Actual Total Cycle Time = 18.7 Seconds
Estimated Productivity:
Probably production: 338 bcy/hr
Time period of the excavation:
Hours of excavating: 680 hr.
Days for operation: 680 hr./10 hr/day = 68 days
Machine: KomatSu Pc 300lc Angle of Swing: 100 Degrees
Depth of Excavation: 3 ft FIll Factor 100%
Cat 450 E Cycle Time Data
Machines : Two Cat 450 E Angle of Swing: 100 Degrees
Depth of Excavation: 3 ft FIll Factor 100%
Cycle Time:
load bucket 5.5 Seconds
Actual load 6*0.35= N/A
Swing time load 3 Seconds
Actual Swing 4*1.67= N/A
Empty bucket 2 Seconds
Swing time empty 3 Seconds
Actual Swing empty 4*1.67= N/A
Theoretical Cycle time 15.9 Seconds
Actual Total Cycle Time = N/A
Estimated Productivity: Bucket size 1.75 yd^3
Probably production: 440 bcy/hr
Time period of the excavation:
Hours of excavating: 552 hr.
Days for operation: 552 hr./10 hr/day = 55.2 days
Equipment Analysis
Cat 450 E
If two smaller excavators, the Cat 450 E were used then a cost and time saving could be achieved.
+
Comat pc 300
The single Comat pc 300 offers good excavation production rate but not as good as two cat 450 E.
VS
55.2 Days vs 68 Days
12.8 Days of Savings
Cost Savings
$107,946 per month x (2.1 / 5 ) = $5,000 saved in General Conditions Alone
* 2.1 weeks saved
* 5 weeks in a month
Summary
Based on the cycle times and my calculations Davis Reed would be better off using two smaller Cat 450 Es which would result in an accelerated excavation of the foundation and underground parking garage. By accelerating the schedule for the excavation and equipment alike, the cost would be less than the cost for the operation while taking less time.
