Stage ◆ Pavilion ◆ Sculpture

State of the art software system is the foundation of the Chrysalis design to fabrication to installation process

Construction photo, July 2016

Chrysalis Stage | Pavilion | Sculpture, Merriweather Park at Symphony Woods

CONSTRUCTION PHOTO, JULY 2016

CHRYSALIS STAGE | PAVILION | SCULPTURE, MERRIWEATHER PARK AT SYMPHONY WOODS

CONSTRUCTION PHOTO, JULY 2016

CHRYSALIS STAGE | PAVILION | SCULPTURE, MERRIWEATHER PARK AT SYMPHONY WOODS

CONSTRUCTION PHOTO, JULY 2016

CHRYSALIS STAGE | PAVILION | SCULPTURE, MERRIWEATHER PARK AT SYMPHONY WOODS

The Chrysalis is the elegant engineering of concrete, steel & aluminum; and, like the nature of its namesake, it is a beautiful and functional transformative structure that is systemically irregular and seemingly delicate, while being extremely sturdy and well founded.
— Michael McCall, President & CEO, Inner Arbor Trust

The Architecture of Math:

The making of a strong & efficient structure

Th Chrysalis foundation is "knit" together by a reinforced concrete floor slab, acting as a diaphragm, and making the whole foundation function as a singular structural element. (Model provided by Arup)

 

The Chrysalis superstructure of 10 and 8 inch tubular steel is "knit" together with "moment" connections, making the whole arched shape act as singular structural element. (Model provided by Arup)

 

The Chrysalis shingled aluminum skin is supported by 450 custom Zahner Engineered Profiled Panel Systems (ZEPPS) aluminum purlins; everyone of which is custom designed and fabricated for its precise form and location. (Model provided by Arup)

CHRYSALIS FROM BACKSTAGE: THE CHRYSALIS IS BUILT FROM A CONCRETE FOUNDATION, SUPPORTING A TUBULAR STEEL STRUCTURE, ON TOP OF WHICH IS ATTACHED AN ALUMINUM SKIN OF ZAHNER ENGINEERED PROFILED PANEL SYSTEMS (ZEPPS) OF PURLINS AND 1/16TH INCH ALUMINUM SHINGLES (Model provide by Arup).


Project Program

Main Floor of 5,079 sq. ft.

  • 108 ft. wide, 57 ft. deep and 52.5 ft. tall (in front of the stage)

  • 2 Prosceniums using same stage floor and same hillside for lawn seating

  • 4,495 sq. ft. stage area

  • 584 sq. ft. Dock area and access

Alpha Stage

  • Comparable to Carnegie Hall & Merriweather Post Pavilion stages

  • Big enough for full orchestra with choir complement

  • Proscenium: 60 ft. wide (at stage floor) x 36 ft. tall, aperture of 1,200 sq. ft. 

  • Performance Zone: 50 ft. wide, 40 ft. deep, 30 ft. tall (+ rigging height)

  • Stage Left & Right Wing Space: 10+ ft.

  • 10 locations for overhead for production trusses, covering the Performance Zone

  • Designed to suspend 42,000 lb. of theatrical gear from ceiling

Beta Stage

  • Proscenium: 30 ft. wide x 24 ft. tall, aperture of 700 sq. ft. 

  • 536 sq. ft. exterior Thrust Stage, including terraced stairs

  • Monumental Stairs descend to Dock level and then lawn grade 

Stage Floor

  • 2 ft. x 2 ft. Ipe wood tiles on top of Bison posts

  • 3” to 9” above drained concrete floor

  • Interstitial space accessible for temporary production cabling  

  • Wood tiles can be individually replaced (like carpet tiles)

Backstage

  • Alpha & Beta Stages function as Backstage to each other

Lower Level

  • 1,547 sq. ft. in walkout basement configuration

  • 1,269 sq. ft. storage, with garage door access

  • 213 sq. ft. electrical power & lighting controls, fire suppression equipment 

  • 65 sq. ft. fire suppression pump closet

Architecture

  • Technique – Parametric, computational, form finding inflation 

  • 9 legs forming 8 asymmetric compound curve arches

    • 1 Alpha Proscenium

    • 1 Beta Proscenium with Monumental Terraced Stairs

    • 1 Beta Stage Left (ADA access to Dock)

    • 1 Truck Dock

    • 1 Boardwalk (ADA access to Stage) 

    • 2 Woods Windows (view to protected stream buffers)

    • Artists Alcove (at grade)

  • Because of arches, at 6 ft. above Stage, the structure is 74% open to the exterior 

  • Aluminum Shingles & Purlins Skin, supported by Tubular Steel Structure

Structural Engineering

  • Wind Tunnel Testing

    • BMT Fluid Mechanics Limited in London conducted the test

    • The design was 3D printed and then tested

    • Tested for 1,700 year wind event, snow loading & suspended theatrical gear loading

    • Tested 33 types of suspended theatrical gear layouts

    • Tested 8 wind directions 

    • Tested 350 different configurations of wind, snow & suspended theatrical gear

  • Resulting Structural Design Parameters

    • 60,000 lb. of lateral (straight line) wind pressure

    • 60,000 lb. of uplift (spinnaker effect) wind pressure

    • 140,000 lb. of downward (snow-load) pressure

Aluminum Shingles & Purlins Skin

  • Entire Aluminum Skin designed, built and installed by A. Zahner Company

  • Shell surface area of 12,027 sq. ft., 

  • 5,064 linear ft. of peaks & valleys in pleated surface (nearly a mile)

  • 4,000 aluminum Shingles, of 3 sq. ft. on average

  • 450 custom ZEPPS Purlins (Zahner Engineered Profiled Panel Systems) 

  • ZEPPS was first used in the Experience Music Project (EMP) in Seattle 

    • Designed by acclaimed architect Frank Gehry, who designed Merriweather Post Pavilion 

  • 32,000 stainless steel fasteners connect ZEPPS steel tube structure

  • Total Skin Weight: 120,000 lb.

Steel Tube Structure

  • 37 tons (74,000 lb.) of steel tubes

  • 1,000 ft. of compound curved 10” tubular steel

  • 675 ft. of straight 8” tubular steel

  • Anchor bolted to poured in place concrete foundation

  • Concrete floor (below wood floor stage) acts as structural diaphragm for lateral stability

  • 300 ft. of 7" curved tubular steel (4 tons) added to suspend up to 42,000 lb. of gear

  • Steel tube structure designed by Arup, fabricated & installed by Zahner

  • Concrete structure designed by Arup, constructed by Whiting Turner

Electrical Service

  • The Chrysalis is served by 2,000 amps of electrical power

  • 400 amp, 96 circuit “house” dimmer rack able to serve 230 theatrical lights

  • 4 onstage interconnects each with 400 amp service for mobile productions