Category Archives: Wood

What Can We Tell from This Photo? (Case Study 9)

Posted by in Fire Damage, Simple Forensic Methods, Wood | August 03, 2015

What can we tell from THIS photo? The wood plates and staples indicate that these are very old field built wood trusses. The soot and char indicate that they have been exposed to a fire. The relatively clean separation between… Read More

How many layers of shingles?

Posted by in Roof, Shingles, Wood | June 22, 2015

How many layers of shingles can be safely supported on a wood framed residential roof? Most building codes limit the number of layers of shingles to two.  As a structural engineer, I design for two, but I prefer one layer… Read More

What Can We Tell from This Photo? (Case Study 6)

Posted by in Simple Forensic Methods, Wood | April 06, 2015

  During our moisture source evaluations we sometimes observe other conditions that we bring to the attention of the owner.  Such is the case for this week’s topic. In the featured photo and Figure FT-1 we see a fractured web… Read More

How Much Snow Can My Roof Support?

Posted by in Roof, Snow Loads, Winter Concerns, Wood | March 02, 2015

After a succession of heavy snowfalls, we are often asked the question, “How much snow can a roof support?” or more specifically, “How much snow can MY roof support?” and “Should I shovel the snow off my roof?” Most who… Read More

Sawing Off the Limb You Are Standing On

Posted by in Roof, The Unusual, Wood | February 02, 2015

Many of us have heard the expression, “You are sawing off the limb you are standing on.”  Often someone will say this during a friendly debate when the other debater is undermining his own argument by discrediting his own evidence.… Read More

This Doesn’t Look Right

Posted by in Buying/Maintaining a Home, Roof, Wood | January 26, 2015

“If it doesn’t look right, it probably isn’t,” it one of my favorite saying.  I started saying that after numerous times of seeing something that didn’t look quite right, and upon further examination I found that it wasn’t.  That is… Read More

Garage Whisperer

Posted by in Simple Forensic Methods, Wind Damage, Wood | December 15, 2014

We are often contacted to evaluate “Why is the garage leaning?” and “When did the lean occur?”  (See the featured photo).  With regard to the latter question, fortunately we have super listening powers.  That is, we are able to hear… Read More

Humps and Sags in a Roof Framed with Sawn Lumber

Posted by in Roof, Wood | December 01, 2014

We are sometimes contacted to evaluate humps and/or sags in roof slopes, as shown in the featured photo and Figures HS-1.  Most often we are asked to evaluate residential roofs which are commonly framed with 2×6 or 2×8 rafters.  … Read More