Download - Space Frames
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An Introduction to Space FramesReferences:
Space Grid Structures by John BorregoThe Design of Building Structures by Wolfgang Schueller (pp521 – 563)
Pearce Structures Literature
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Carnegie Mellon • Department of Architecture • Third Year Studio
Lattice Grids
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Carnegie Mellon • Department of Architecture • Third Year Studio
Direct Grids
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Carnegie Mellon • Department of Architecture • Third Year Studio
Offset Grids
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Carnegie Mellon • Department of Architecture • Third Year Studio
Differential Grids
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Carnegie Mellon • Department of Architecture • Third Year Studio
Structural Behavior
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Carnegie Mellon • Department of Architecture • Third Year Studio
Support Locations• Systems w/ Symmetry about Two or Three Axes
are Structurally Efficient• Column Supported Space Frame Behaves Like a
Concrete Flat Plate• Parallel Wall Supported Space Frame Behaves
Like a Concrete One Way Slab• Peripheral Wall Supported Space Frame
Behaves Like a Concrete Two Way Slab
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Carnegie Mellon • Department of Architecture • Third Year Studio
Support Matrix
• Row 1 – Simple Column – Wall• Row 2 – Column – Wall w/ Beams• Row 3 – Columns w/ Beams
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Carnegie Mellon • Department of Architecture • Third Year Studio
Support Points
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Carnegie Mellon • Department of Architecture • Third Year Studio
Span to Depth Ratio• Horizontal Double Layer, Edge Supported
• One Way, 12:1• Two Way, 15:1• Three Way, 20:1• Cantilever Spans, 9:1
• Horizontal Double Layer, Corner Supported• 15:1
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Carnegie Mellon • Department of Architecture • Third Year Studio
Bay Size (a)• Maximum Bay Size
• L/5 a 30 ft
• Typical Bay Size• 4 ft a 12 ft
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Carnegie Mellon • Department of Architecture • Third Year Studio
Dimensions• Frame Depth
• 0.5 d/a 1.0• Ex: 0.5 = d/a or 2 ft deep and 4 ft bay size
1.0 = d/a or 4 ft deep and 4 ft bay size
• Chord Angle• 30° 60°
• Aspect Ratio (Member Length / Diameter)
• 25:1
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Carnegie Mellon • Department of Architecture • Third Year Studio
Erection Methods• Scaffold Methods
• Individual Elements are Assembled in Place at ActualElevations
• Block Assembly Methods• Components are Pre – Assembled on the Ground and
Crane or Hoist Erected
• Lift – Up Methods• Large Sections are Pre – Assembled on the Ground and
Erected w/ Heavy Equipment e.g. Hydraulic Jacks
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Carnegie Mellon • Department of Architecture • Third Year Studio
Joint Types• Connector Plates• Hollow Balls• Solid Balls• Extruded Hubs• Welded Multi–Planar Gusset Plates• Mulithinge
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Carnegie Mellon • Department of Architecture • Third Year Studio
Connector Plates• Unistrut
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Carnegie Mellon • Department of Architecture • Third Year Studio
Hollow Balls• Nodus
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Carnegie Mellon • Department of Architecture • Third Year Studio
Solid Balls• Mero
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Carnegie Mellon • Department of Architecture • Third Year Studio
Mero Geometry
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Carnegie Mellon • Department of Architecture • Third Year Studio
Extruded Hubs• Triodetic
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Carnegie Mellon • Department of Architecture • Third Year Studio
Triodetic Geometry
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Carnegie Mellon • Department of Architecture • Third Year Studio
Welded Multi–Planar Gusset Plates• Custom Fabricated • Octatube
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Carnegie Mellon • Department of Architecture • Third Year Studio
Multihinge• Pearce Structures