Calculating Attic Ventilation to Comply with the IBC

by EVstudio AEP December 14, 2018

Enclosed attic spaces for buildings that fall under the IBC are required to be ventilated.  These spaces are formed where ceilings are applied directly to the underside of roof framing members.  IBC 1203.2 requires 1/150th of the attic area to be ventilated but there is […]

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Proper Bearing of I-Joist Rafters

by evstudio March 29, 2018

As today’s architectural design trends toward more open floor plans with vaulted ceilings there is a need for economical rafters that will span long distances while maintaining a shallow profile. In many situations pre-manufactured I-joist rafters fit that need. As a structural engineer I have […]

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Don’t Make Your Solid Blocking Too Solid – Attic Ventilation Requirements

by Sean O'Hara November 14, 2017

I was at a job site today and noticed that the contractor had used blocking between trusses where the blocking was large enough that it actually blocked off the ventilation from the soffits.  They’re going to have to go back and put holes in the […]

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