Senior Thesis Analysis Topics Alternate Formwork System Evaluation - - PowerPoint PPT Presentation

Senior Thesis Analysis Topics

Alternate Formwork System Evaluation (Depth Analysis) The Green Building Reference Guide (Depth Analysis) Office Tower Structural Redesign (Breadth Analyses)

Introduction

LEED Rating

Arlington’s first LEED rated

• ffice building (Silver Rating)

Occupants

Headquarters of United States Navy League Retail, Offices

Design

Skewed plan 212,947 sq.ft. 7- story office tower 164,561 sq.ft. 4 - story sub-grade parking garage

Structure M.E.P.

VAV system Copper bus duct power risers Office tower: structural steel Parking garage: C.I.P. concrete

Introduction

Project Background

Project Team

Main Subcontractors:

Concrete: Southland Concrete Structural Steel: Strait Steel Electrical: J.E. Richards Mechanical/Plumbing: W.E. Bowers

Owner: U.S. Navy League Architect: Page Southerland Page LLC Owner’s Representatives: The Keech Company LLC, Lincoln Properties General Contractor: James G. Davis Construction Corp.

GMP Contract Lump Sum Contracts

Project Background

Start Date: 5/8/2003 Scheduled Completion Date: 4/26/2005

Project Schedule Project Delivery

Design – Bid - Build

Building Costs

Alternate Formwork System Evaluation

As-built System:

Aluminum framing & plywood sheathing Labor and material intensive

Analysis Overview & Goals

Alternate System:

Accommodate existing design Reusable components

Goals:

Decrease formwork budget & duration Improve sustainability aspects

Alternate Formwork System Evaluation

Mid-State Filigree Systems

Available Formwork Systems

Peri ‘Skydeck’ ‘Tabla’ by Gillespie Practical Technologies, Inc. ‘Titan HV’

Alternate Formwork System Evaluation

Slab Design Factors

Alternate Formwork System Evaluation

Slab Design Factors

First Floor Slab Framing Plan

Alternate Formwork System Evaluation

Design Characteristics

Formwork System Selection

Engineering Material Costs Labor Local Codes Reusability Viable Alternate System: ‘Titan HV’

Accommodates design Potential labor savings FSC plywood compatible

Alternate Formwork System Evaluation

Cost & Production Factors

Alternate Formwork System Evaluation

Conclusion

Reusability

Excellent Satisfactory Poor

Local Codes Labor Material Costs Engineering Design Characteristics

Titan HV System Standard System Selection Criteria

Standard aluminum system is best option for the parking garage

The Green Building Reference Guide

Analysis Overview & Goals

LEED ratings & sustainable design Additional planning and management required Unnecessary costs and possible delays Lack of dedicated construction resources

Issues: Solution:

Easily accessible network of resources Organize online resources through structured website

Goals:

Develop website to aid construction professionals Increase knowledge = better chances of project’s success

Reference Guide Development

Form: Form Function Content

Readily accessible platform: website Free to use & kept current Targeted organization & direct format Database of available online resources Main Topics:

Material Procurement Indoor Environmental Quality Commissioning Waste Management Site Management

The Green Building Reference Guide

Reference Guide Development

Function:

Website demonstration:

The Green Building Reference Guide

Reference Guide Development

Content:

Filtered content Benefits: reduces search time, increases productivity User input for future development & expansion

The Green Building Reference Guide

Conclusions

GBRG created to address needs of building professionals Targeted, organized content in graphical format Positive feedback indicates value and potential

The Green Building Reference Guide

Office Tower Structural Redesign

Analysis Overview & Goals

Issues: Solution:

Design C.I.P. concrete office tower Establish costs & duration of alternate system

Goals:

Reductions in budget and schedule with concrete tower System with least environmental impact Structure transitions from concrete garage to steel tower Inherent difficulties of steel: cost, time M.E.P. coordination Environmental impact of steel production

Images of structural steel erection

Office Tower Structural Redesign

Concrete Structure Design Development

Criteria: Design Consideration:

Given span length, post-tensioning required Develop schematic design Maintain current structural layout and clearances Maintain open plan office spaces

Characteristics of Current Structural Steel System Dimensions

Floor to Floor Height

13’- 4”

Maximum Member Depth

24”

Composite Slab Thickness

6”

Maximum Bay Span

43’

Office Tower Structural Redesign

Concrete Structure Analysis

Slab Type Thickness (in) 12 Width (in) 36 Concrete Columns Beams Slab 5000 5000 5000 Steel Reinforcement Post-Tensioning Cables System Type Unbonded 0.153 in^2 (7/16" Diam.) Loading

• Typ. Floor

Roof Uniform 80 psf 100 psf Columns Size 14" x 14" Two-way, Flat Slab Strength (psi) Ultimate Tendon Strength 270 ksi Design Load 150 (Normal weight) Bar Yield Strength (fy) Modulus of Elasticity Clear Bar Cover Floor to Floor Height 13' - 6"

Post-Tensioning Design Characterisitics

29,000 ksi 1" 60 ksi Type Unit Weight (psf) Area of Tendons Slab Dimensions Drop Panel Dimensions Tributary Width (ft) Span Length (ft) 30 29.5 to 43 Length (in) 36 Depth (in) 8

Office Tower Structural Redesign

Concrete Structure Analysis

Rendering of C.I.P. Concrete Slab, Columns, & Drop Panels

12” Thick Post-Tensioned Slab 36” x 36” x 8” Deep Drop Panel, Typical

Office Tower Structural Redesign

Budget & Schedule Comparison

Cost difference of $863,000 Concrete is 33% more expensive than steel

Office Tower Structural Redesign

Budget & Schedule Comparison

Office Tower Structural Redesign

Additional Topics

Applications of Alternate Formwork System

‘Titan HV’

Structural & M.E.P. Coordination Environmental Impact: Concrete vs. Steel

Benefits of steel = benefits of concrete

Office Tower Structural Redesign

Structural & M.E.P. Coordination

Coordination Plan:

H.V.A.C. Plan with C.I.P. System Overlay

Office Tower Structural Redesign

Conclusions

Most appropriate Equal advantages Least appropriate

Environmental Impact M.E.P. Coordination Total Duration Total Cost

Post-Tensioned Concrete System

Steel System

Analysis Criteria Structural steel provides greater value most appropriate

Conclusions

Alternate Formwork System Evaluation The Green Building Reference Guide Office Tower Structural Redesign

Most viable: Titan HV system Titan HV: greater cost & duration Selected standard aluminum system Logically organized, up-to-date list of resources Positive feedback indicates potential Post-tensioned, C.I.P. concrete structural system

Greater overall cost and duration Equal environmental impact

Existing steel system offers best value

Acknowledgements

I would like to thank the following people for their help and support in the development of this Senior Thesis Project:

Penn State University

• Dr. Michael Horman (Thesis Advisor)
• Dr. David Riley
• Dr. Kevin Parfitt

James G. Davis Construction Corp

Bill Moyer Dave Purdy Hasan Alsayegh Kim Pexton

The Keech Company

Bill Keech Sr. Bill Keech Jr.

Personal Contacts

My fiancé, Diane My family My friends Southland Concrete

Mark Aulabaugh

Titan Formwork Systems, LLC

Paul Tauscher

Arlington County, Virginia

Michael Lewis

Questions Questions ?

?

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