Terrell Place Washington D.C. Senior Thesis Presentation Tracy Lo - - PowerPoint PPT Presentation

▶
terrell place washington d c
SMART_READER_LITE
LIVE PREVIEW

Terrell Place Washington D.C. Senior Thesis Presentation Tracy Lo - - PowerPoint PPT Presentation

Nov 10, 2023 110 likes •469 views

Terrell Place Washington D.C. Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management Project Overview An 11 Story cast-in-place concrete office building Location: 575 7 th St NW Washington D.C. Function:

slide-1
SLIDE 1

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Terrell Place Washington D.C.

slide-2
SLIDE 2

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Project Overview

An 11 Story cast-in-place concrete office building Location: 575 7th St NW Washington D.C. Function:

Office Building Retail space on 1st floor Parking garage

slide-3
SLIDE 3

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Project Overview

Size: 439,390 sq ft Construction Date:

Started in Aug of 2001 Finish in Oct of 2003

Cost: $48.5 million

slide-4
SLIDE 4

Existing Hecht’s Building New West Building Existing Gang of Four New Building Not in project Existing AARP Existing Building Future Residential

Terrell Place

MCI Center NRC Firehouse F street, NW E Street, NW

7th street, NW 6th street, NW N

Terrell Place - Site Plan

slide-5
SLIDE 5

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Project Overview

Project Team

Owner: Carr America Urban Development LLC GC: Clark Construction Groups Architect/Engineer: SmithGroup Mechanical Contractor: Pierce Associates, Inc. Electrical Contractor: Truland Systems Corp.

Interesting Fact

Named the Best Office Lease/Urban for 2001 in the Washington Business Journal’s Annual Best Real Estate Deals of the years awards with the largest law firm in Washington D.C.

slide-6
SLIDE 6

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Presentation Outline

  • Site Logistic
  • Studies of Historical Renovation
  • Possibilities of Using other Horizontal

Formwork

  • Redesign the Foundation System
  • Research: Mold Issues in construction

industry

slide-7
SLIDE 7

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Site Logistic

Current Problem

Only one site plan developed Relatively congested site and narrow access road

Proposed Solution

Three phase site plans Clearly show the location of the equipments and access during different phases Create one way traffic flow

slide-8
SLIDE 8

Existing AARP Building Existing Restaurant (5 story) Future Residential (under construction) Existing 5-story building

Existing Site Plan

Sheeting/Shoring Façade Support

Existing Hecht’s Building (1 Basement) Existing Gang of Four (to be demolished) New West Building 4 Basements

Sheeting/ Shoring

Staging Area Curb Lane Construction Safety Fence

Trash Chute & Dumpster Material Hoist

Entrance

Excavation Ramp

Construction Trailer Temporary Access Road for Demolition Debris Removal

Construction Safety Fence Temporary Pedestrian Sidewalk Crane #1 Crane #2

slide-9
SLIDE 9

Existing AARP Building Existing Restaurant (5 story) Future Residential (under construction) Existing 5-story building

Demolition/Excavation Phase

Façade Support

Existing Hecht’s Building (1 Basement) Existing Gang of Four (to be demolished) New West Building 4 Basements

Sheeting/ Shoring

Staging Area Curb Lane Construction Safety Fence

Trash Chute & Dumpster Material Hoist

Entrance

Excavation Ramp

Construction Trailer Temporary Access Road for Demolition Debris Removal

Construction Safety Fence Temporary Pedestrian Sidewalk Sheeting/Shoring

Excavation Ramp

slide-10
SLIDE 10

Existing AARP Building Existing Restaurant (5 story) Future Residential (under construction) Existing 5-story building

Superstructure Phase

Sheeting/Shoring Façade Support

Hecht’s Building Gang of Four New West Building

Sheeting/ Shoring

Staging Area Curb Lane Construction Safety Fence

Trash Chute & Dumpster Material Hoist

Entrance

Construction Trailer

Construction Safety Fence Temporary Pedestrian Sidewalk

Concrete Pump

Crane #1 Crane #2 Staging Area

slide-11
SLIDE 11

Existing AARP Building Existing Restaurant (5 story) Future Residential (under construction) Existing 5-story building

Finishes Phase

Hecht’s Building Gang of Four New West Building

Curb Lane Construction Safety Fence

Trash Chute & Dumpster Material Hoist

Entrance

Construction Trailer

Construction Safety Fence Temporary Pedestrian Sidewalk Mobile Crane

slide-12
SLIDE 12

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Presentation Outline

  • Site Logistic
  • Studies of Historical Renovation
  • Possibilities of Using other Horizontal Formwork
  • Redesign the Foundation System
  • Research: Mold Issues in construction industry
slide-13
SLIDE 13

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Historical Preservation Government of D.C. – Preservation law 8 different types of windows on the façade and three different store front.

Study of the facade

slide-14
SLIDE 14

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Study of the facade

Problem Long installation time Reason for delay

Proposed Methods

Combining Precast and window supplier But…..some windows are 10 feet high and 800 pounds, difficult for handling and shipping

slide-15
SLIDE 15

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Presentation Outline

  • Site Logistic
  • Studies of Historical Renovation
  • Possibilities of Using other Horizontal

Formwork

  • Redesign the Foundation System
  • Research: Mold Issues in construction industry
slide-16
SLIDE 16

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Possibility of Using other Horizontal Formwork

Three options

Compare the cost and schedule for all the options

Each floor of the New West Building: 19,200 SF Each floor of the GOF building: 12,000 SF

PERI skydeck with customized design Original structural design PERI skydeck New structural design Scaffolds and plywood Original structural design Construction methods Structural changes

slide-17
SLIDE 17

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Original structural design using scaffolds and plywood (Option 1) Two way slab with drop panels Original slab thickness: 8 in Drop panels: 8 in Plywood and aluma frames Cost: $0.83 – $0.91 / sf

Total cost of formwork and labor: $961,634

Productivity rate:18-20 sf / mh

Duration of GOF: 104 days Duration of West building: 164 days

Possibility of Using other Horizontal Formwork

slide-18
SLIDE 18

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

New structural design using PERI skydeck (Option two) ADOSS program, determine slab thickness

Possibility of Using other Horizontal Formwork

slide-19
SLIDE 19

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Possibility of Using other Horizontal Formwork

PERI skydeck Cost: $1.10 -$1.50 / sf

Total cost and labor: $954,126

Productivity rate: 20-30 sf / mh Duration of GOF: 65 days

Duration of West: 113 days

Impact of changing the formwork

slide-20
SLIDE 20

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Possibility of Using other Horizontal Formwork

Original Structure using PERI skydeck with customized formwork around the drop panels

(option 3)

  • Cost of the formwork: $1.39-$1.50 / sf
  • Total cost of formwork and labor: $1,128,574
  • Productivity rate:18-20 sf / mh
  • Same as option 1
slide-21
SLIDE 21

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Possibility of Using other Horizontal Formwork

Comparisons of the original method and the two other alternatives:

Most expensive, relative slower rate No changes in structural design GOF –102 days West – 164 days 18-20 sf / mh $1,281,574 $1.39

  • 1.50/

sf 3 - Original design with drop panels using customized PERI Skydeck Less plenum space, changes of structural design Cheapest fastest method among the three

  • ptions

GOF –65 days West -113 days 20-30 sf / mh $954,126 $1.10

  • 1.50/

sf 2 - Flat slab using PERI Skydeck Relative slower rate Traditional method GOF –102 days West – 164 days 18-20 sf / mh $961,634 $0.83

  • 0.91/

sf 1 - Original design with drop panels using stick build method Disadvantages Advantages Duration Productivity Rate Total Cost Cost Option

slide-22
SLIDE 22

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Presentation Outline

  • Site Logistic
  • Studies of Historical Renovation
  • Possibilities of Using other Horizontal Formwork
  • Redesign the Foundation System
  • Research: Mold Issues in construction industry
slide-23
SLIDE 23

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Analysis 4: Redesign the Foundation Systems

Problem Spread Footings Constructability issues:

Difficult to construct the spread footings for this project due to the footings having different elevations adjacent to each other OSHA standard - sloping back around the excavation was necessary

Proposed System Mat slab foundation

slide-24
SLIDE 24

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Analysis 4: Redesign the Foundation Systems

121333 86 1107 37 5000 psi 123506 84 1479 39 4000 psi 122652 77 1093 42 3000 psi Cost Concrete Unit Cost Volume Thickness of Foundation (in) Gang of Four 352959 86 4107 50 5000 psi 367177 84 4397 53 4000 psi 357405 77 4642 57 3000 psi Cost Concrete Unit Cost Volume Thickness of Foundation (in) West Building

slide-25
SLIDE 25

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Analysis 4: Redesign the Foundation Systems

Spread Footings Disadvantages: More concrete is used for the GOF Difficult excavation due to different elevations of the footings Slow productivity during excavation, takes longer to excavate Advantages: Less concrete is used for the West Building Less material (rebar, formwork) Allow to set rebar along the footings while formwork is being placed

slide-26
SLIDE 26

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Analysis 4: Redesign the Foundation Systems

Mat Slab Disadvantages: Need to set rebar on site because of the amount of rebar Large amount of concrete and rebar One continuous pour, longer hours for workers Heavy traffic due to 30-40 trucks per hour move through the site Advantages:

  • Better constructability
  • Reduce duration by 10

days

  • Comparable cost as spread

footings

slide-27
SLIDE 27

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Presentation Outline

  • Site Logistic
  • Studies of Historical Renovation
  • Possibilities of Using other Horizontal Formwork
  • Redesign the Foundation System
  • Research: Mold Issues in construction industry
slide-28
SLIDE 28

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Research Topic: Mold Issues

Why are people looking into mold related problem in the construction industry? Litigation Sickness related to mold What is mold? What causes mold? A non-specific term of a type of fungus Air borne Moisture, food source,

  • xygen and warm

temperature

slide-29
SLIDE 29

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Research Topic: Mold Issues

Is Mold toxic? Mold itself is not toxic By products – mycotoxins will cause serious health problem Sickness Related to Mold No medical evidence on mold in buildings lead to sickness Allergic reactions Studies of Court Cases Property damage claims and personal injury claims Pay millions of dollars

slide-30
SLIDE 30

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Research Topic: Mold Issues

Lack of standards No standards related to the level of mold exposure that is harmful to human No inspection standards What to do if mold if found? Follow guidelines established by the EPA or AGC

slide-31
SLIDE 31

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Research Topic: Mold Issues

What needs to be done related to this problem?

Need more development on medical field Set up regulations and standards

slide-32
SLIDE 32

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Conclusion

Site Logistic

Important to create one way traffic within the site More detailed site plans provide better understanding

Studies of Historical Renovation

Good concept to combine the window and precast panels suppliers But difficult to implement due to the special condition

slide-33
SLIDE 33

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Conclusion

Possibilities of Using other Horizontal Formwork

Prefabricated formwork for slab would be the best choice in terms of time and cost More changes of other structural components to increase the plenum space was necessary

Resign the Foundation System

Mat slab foundation will shorten the schedule by 10 days Large amount of material and intensive work

Research: Mold Issues in construction industry

More government involvement is needed to set up the standards

slide-34
SLIDE 34

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003

Thanks to

Clark Construction Group Truland Systems Inc.

  • Dr. Horman
  • Dr. Messner
  • Dr. Riley

AE faculty Friends and Family Dave

slide-35
SLIDE 35

Tracy Lo Construction Management Senior Thesis Presentation April 16, 2003