council rock high school south brad kirkham structures council rock high school south northampton...

Brad KirkhamBrad Kirkham StructuresStructures

Council Rock High School South


Northampton Township


Brad Kirkham

5th Year Capstone Project

Structures



Presentation Background

Project Background

Existing Structural Systems

Existing Architecture

New Architecture

Structural Redesign

Construction Sequence

Conclusions




Project Background

Owner: Council Rock School District

Architect: Gilbert Architects

Structural Engineer: Baker, Ingram & Associates

Mechanical Engineer: Moore Engineering Company

Construction Manager: Bovis Lend Lease, Inc.

General Contractor: Bilt Rite



Project Background

• Dates of Construction

• September 2000 – December 2002

• Construction Cost

• $40 M

• Project Size

• 360,000 ft2



Existing Structural System

Auditorium

• 110 foot Barrel Vaulted Trusses

• 12” Precast Plank Floors

• Masonry Bearing Walls

• Acoustic Roof Deck




Classrooms

• Masonry Bearing Walls

• 8” Precast Plank Floors




Gymnasium

• Custom Bowstring

Trusses Spanning

108 feet

• Bar joists Spanning

Between the Trusses

• Epic Acoustic Roof Deck



Proposal

• Modify Architecture of Gymnasium Roof

• Investigate a Space Frame

• Sequence the Construction



New Architecture of Gymnasium• Preserve themes of building in the base

• Use roof as the dynamic component



Existing Systems• Lighting

• Industrial High Bay w/ Refractor

• Quartz Cylinder w/ Narrow Beam Distribution

• Mechanical

• Diffusers Located In Gym Wall

• Ceiling Fans Attached to Roof Structure

• Plumbing

• Roof Drains Adequate on East Side

8” drains

3” drains



Changes in Roof Plumbing

• Resize Roof Drains on West Side of Roof

• Add a roof drain against wall

New Architecture of Gymnasium

Changes in Lighting System

• Slight Modifications in Attachment

Changes in Mechanical System

• Slight Modification in Ceiling Fan Attachment

• Walls were Unmodified8” drains

8” drains



Structural Redesign

International Building Code 2000

American Society of Civil Engineers 7-98

Load & Resistance Factor Design 2nd edition

Codes & Specifications



Structural Redesign

• Double Layered Space Frame

• 6’ Octahedron module

• Square on Offset Square Pattern

• 8” pipe shapes typical

• Mero KK node system



Structural Redesign

Advantages

• Load Sharing

• Redundancy

• Equipment Installation

• Ease of Erection

Disadvantages

• Cost

• Geometry

• Erection Time

• Fire Protection



Column Location

• Minimize Changes

• Use Frequent Supports

• Use Modular Spacings

Footings

• Existing – 8’ x 8’ typical

• New – 10’ x 10’ typical



Structural Redesign

Seismic Analysis

• Modal Superposition with 3 modes based on CQC

• Drift limits achieved

• Dynamic Analysis – Frequency and Period

• Spectral Analysis – Effective Mass



New Roofing Material

THERMASPAN®

• Light Weight – 0.762 mm Panels

• Rebated Foam

• Adaptable Roof Profiles

• 3 in 1 Design

• Custom Colors



Fireproofing

Concerns

• Preserve Architecture

• Keep Cost Down

• Gain Necessary Rating

The Solution

• Intumescent Fire Proofing

• 1 mm Coating

• Expands to 100 mm

However:

Fire modeling software is available for models of large spaces

- Fire Proof Key Structural Members



Cost of Construction

Space Frame SF 19872 $715,392.00 $32,192.64 $19,872.00 $767,456.64Stressed Skin Roof SF 19872 $101,347.20 $33,583.68 $20,865.60 $155,796.48

$816,739.20 $65,776.32 $40,737.60 $923,253.12

Field Welding LF 132 $95.04 $1,326.60 $347.16 $1,768.80Steel Beam Erection LF 824 $31,724.00 $2,084.72 $947.60 $34,756.32Truss Erection LF 2024 $10,626.00 $2,368.08 $1,153.68 $14,147.76Custom Truss Ton 107 $294,250.00 $27,285.00 $12,519.00 $334,054.00Decking SF 19872 $116,648.64 $20,865.60 $1,391.04 $139,104.00

$453,343.68 $53,930.00 $16,358.48 $523,830.88

Old System

Labor CostEquipment

Cost Total CostNew System

Material CostDescription Unit Qty

Difference = $400,000

1% of Const. Cost



Construction of Existing System

Space Frame SF 19872 1200 17Stressed Skin Roof SF 19872 1150 18

35

Field Welding LF 132 30 5Steel Beam Erection LF 824 1000 1Truss Erection LF 2024 2400 1Custom Truss Ton 107 11 10Decking SF 19872 1100 19

36

Time (Days)

New System

Old System

Description Unit QtyDaily

Output



Modular Qualities

• 12’ x 42’ Erection Modules

• Ease of Erection

Considerations

• Truck Bed – 9’ x 40’

• Ship at Night



Construction Sequence Comparison



Conclusions

Space Frame Cost is an Issue

Constructed in Same Amount of Time

Minimal Impact on Rest of the Building

Architecture is Greatly Improved

Warrants a Proposal to the Owner



Thanks

Council Rock School District

Baker, Ingram & Associates

AE Faculty

Classmates

Family and Friends



Questions?

council rock high school south brad kirkham structures council rock high school south northampton...

Documents

construction slide

walls acoustic roof

architecture of gymnasium

roof plumbing

dynamic component slide

bilt rite slide

base use roof

construction cost