This is an exercise to develop the abilities of observation. What can one know from examining this photograph? The wood trusses are showing distress. Specifically, the members are buckling and the trusses are leaning as evidenced by the members… Read More
Author Archives: Jerry Prugar
What Can We Tell from This Photograph? (Case Study 2)
This is an exercise to develop the abilities of observation. What can one know from examining this photograph? The tabs with the diagonal crease (upper left of the photo), the double horizontal creases (lower center of the photo), and… Read More
What Can We Tell from This Photograph? (Case Study 1)
This is an exercise to develop the abilities of observation. What can one know from examining this photograph? The framing and the insulation indicate that it was taken in an attic. The color of the lumber and the use… Read More
Some Evidences of Recent Movement
We are often called in to evaluate as to whether some particular damage is old or new, that is, did it occur recently as reported or has it been present and possibly progressing for years. As experienced forensic engineers we… Read More
Evaluation of Concrete for Fire Damage
Just read a well-written article in Structure magazine about evaluating fire damage to concrete foundations, entitled Engineering Evaluation of Fire Damage to Concrete Foundations, by Peter Marxhausen, M.S., P.E. Mr. Marxhausen writes about his approach to evaluating numerous concrete foundations… Read More
Bulging in a Clay Brick Wall
What causes a clay brick wall to bulge outward as we see in Photo CBW-1? A bulging clay brick wall is an unexpected sight to most observers. When one becomes aware of a bulging brick wall one is… Read More
Can Ventilation Really Reduce Condensation and Mold Growth in an Attic?
Most in the construction industry know that the attics of wood framed structures require adequate ventilation to reduce the risk of the condensation of excessive airborne moisture and the resulting mold growth. But, how much does ventilation reduce condensation and… Read More
When Winterizing a Swimming Pool
Here’s an important reason to lower the water level in a swimming pool when winterizing. If the water level is not properly lowered in a swimming pool when it is closed for the season, that is, the water level is… Read More