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General contracting · Case study

Site-Built Structural Box Beam

Lock Haven, PA · 2023

A structural "box beam" I built and set myself to carry the roof load across a wide opening. It's a deep, built-up beam — dimensional lumber framing sheathed in APA-rated structural plywood — fabricated on site to an engineered, code-approved design and set in place to carry the span.

Project photos

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Site-built plywood box beam carrying the roof framing up to the ridge in a vaulted, metal-roofed structureView original photo ↗
Site-built plywood box beam carrying the roof framing up to the ridge in a vaulted, metal-roofed structure
Underside of the APA-rated structural plywood box beam spanning beneath the metal roof framingView original photo ↗
Underside of the APA-rated structural plywood box beam spanning beneath the metal roof framing
The structural box beam spanning a wide opening, sheathed in rated structural plywoodView original photo ↗
The structural box beam spanning a wide opening, sheathed in rated structural plywood
The box beam carrying the roof structure across an interior opening, with framing and decking aboveView original photo ↗
The box beam carrying the roof structure across an interior opening, with framing and decking above

How the job was done

  1. Worked from the engineered, code-approved design — beam depth, plywood layout, and fastening for the span and load.
  2. Fabricated the built-up box beam on site: dimensional lumber framing sheathed in APA-rated structural plywood.
  3. Set and fastened the beam into the opening to carry the roof framing across the wide span.
  4. Had it inspected and signed off as a code-approved structural member.
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The service & area behind this job

Decks, porches & railingsHome repairs, carpentry & flooringContractor in Lock Haven, PA

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