Heavy Timber Type IV Construction

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Heavy Timber Type IV Construction

• Post and Beam
• Mill Construction
• Slow Burning Construction

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The Reduction Of Old Growth Forest Has Changed
Timber Construction

• Glue Laminated Beams Are Used Now
• They Have Greater Spanning Ability
• They Are More Dimensionally Stable
• Often Require Reduced Depth
• Recycling Also Being Used

3
Four Types Of Timber Decking
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Typical BOCA Code Requirements

• Supporting Floor Loads
• Columns 8X8
• Beams 6X10
• Trusses 8X8
• Decking 31

• Supporting Roof And Ceiling Loads Only
• Columns 6X8
• Beams 4X6
• Trusses 4X6
• Decking 2 or 1 1/8 Plywood

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Fire Resistance

• Heavy Timbers Absorb Heat
• The Larger The Timber The Greater Its Resistance
  To Ignition
• Chamfered Edges Reduce The Risk Of Ignition
• Retains Its Structural Integrity

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Timbers Can Be Affected By Shrinkage

• Seasonal Changes
• Size Of Members Moisture Retention
• Minimize Exposure to Concrete Masonry
• Eliminate Cross-Grain Wood From Interior
• Iron Pintles or Bearing Blocks Carry Weight From
  Column Across Beams

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Connections Between Columns And Beams

• Shoulder Bearing
• Bearing Blocks
• Split Rings
• Iron Pintles
• Welded Metal Connectors

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Traditional Joinery
Double Mortise
Brace Mortise
Mortise Tenon
Tongue--Groove
Dovetail
Shoulder Joint
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The First Step In Cutting A Timber Frame Is
Laying OutThe Joints
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Next The Timbers Are Predrilled For The Pegs And
Cut To Length
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Then The Mortises Are Added With A Plunge Router
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Next, Tenons And Dovetails Are Cut With Saws And
Chisels
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Finally, Stains And Finishes Are Added
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Finishes Are Added For Various Reasons

• Preservation
• Highlight The Grain
• Age The Wood
• Smooth Lamination

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Lateral Bracing Can Be Achieved

• Diagonal Bracing With Wood Or Steel Connectors
• Shear Panels Made Of Plywood, Concrete, Or
  Masonry
• Combination Of Lateral Reinforcement And Post And
  Truss System Called Bents

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Various Bents
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When Timber Beam Meets Masonry The Result Is The
Fire Cut
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A Typical Wall Section Or Skin
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Heavy Timber Is Constructed Now As It Was Then
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Bents Are Assembled And Laid Out
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The Team Begins To Raise The Bents Into Position
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Cranes Are Used To Raise The Heavy Beams
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The Team Breaks For A Photo Opportunity
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The Frame Is Finally Finished
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Beautifully Modern Exteriors
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From Mansions ...
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To Farm Houses
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Places Of Worship
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Stadiums And Sport Facilities
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Even Bridges
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Cabins To Public Facilities Like...
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The Vermont Visitor Center
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The Result Is Always The Same...
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Pure Beauty Combined With...
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The Warmth Of Wood
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Interior Concepts
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And Modern Amenities
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Created By Mouse In The House Productions

• Dan Love ACH 122
• Materials And Methods II
• Professor Richard Luxenburg AIA
• Spring 2000