Acterna Headquarters John M Sekel, EIT Germantown, Maryland The Pennsylvania State University Architectural Engineering 2003 Senior Thesis Presentation Structural Emphasis

Presentation Overview Existing building Problem statement Proposal Structural re-design Construction considerations Architecture re-design Mechanical considerations Conclusions Structural Option John M Sekel

Existing building Project Team Owner: Milestone Industrial, LLC. Architect: Hickok, Warner, Fox Architects Structural Engineer: Structural Design Group MEP Engineer: Girard Engineering General Contractor: L.F. Jennings Structural Option John M Sekel

Existing Building General New corporate campus for Acterna Corporation Site clearly visible off I-270 outside Washington, D.C. Six story, 187,500 sf office building $10 million construction cost Structural Option John M Sekel

Existing Building Structural Composite beam and slab construction 50 ksi wide flange shapes 30’x25’ typical bays 3 ¼” lightweight concrete slab on 2” metal decking Spread footing foundations First floor slab on grade 2 – transfer girders over conference room on level 1 4 – braced frames for lateral stability Structural Option John M Sekel

Existing Building Typical framing plan Structural Option John M Sekel

Existing Building Mechanical Lighting/Electrical VAV boxes with electric duct heaters and reheat coils with VFD 2 – 15000 cfm VAV A/C units per floor 2 – 350 ton cooling towers Plate and frame heat exchanger Lighting/Electrical 480/277 volt, 3-phase, 4 wire system 4000 amp primary switchboard 2000 amp secondary switchboard 2000 kW emergency generator 2’x4’ Lightolier 277 volt florescent fixtures Structural Option John M Sekel

Problem Statement Column lines limit space usage Design and construction can be coordinated better Etc. Structural Option John M Sekel

Proposal Structural design criteria Eliminate intermediate column line outside of core Long span steel from core to exterior “Stream-line” the structure Design for ease of construction Produce most efficient design Structural Option John M Sekel

Proposal Architectural design goals Reflect structural changes in the façade Open interior spaces, column free areas Produce modern look ?? Structural Option John M Sekel

Proposal Construction considerations Mechanical considerations Reduce construction cost Reduce construction schedule time Integrate building design and construction Mechanical considerations Analyze impact of façade design on system Structural Option John M Sekel

Structural depth Framing re-design New bay size outside of core 30’x50’ 50 ksi wide flange shapes Most readily available 3 ¼” lightweight concrete slab on 2” metal deck 2 hour fire rating Re-size frames for additional gravity load Structural Option John M Sekel

Structural Depth New framing plan Structural Option John M Sekel

Structural Depth New member sizes Girders Beams Structural Option Original: W18x35 New design: W24x62 Beams Original: W14x22 New design: W24x55 Structural Option John M Sekel

Architectural Breadth Structural Option John M Sekel

Construction Breadth Structural Option John M Sekel

Conclusions Structural Option John M Sekel

Thank You Structural Option John M Sekel

Questions? Structural Option John M Sekel