August 4, 2017
Outley Elementary School, 12355 Richmond Avenue, Houston, TX 77082
Structural Engineering Review and PE Stamp of Drawing
Engineering Examples was hired by Southwest Graphix to review and stamp a drawing for a masonry wall that will be placed at the entrance of Outley Elementary School located at 12355 Richmond Avenue, Houston, TX 77082. The masonry wall primarily consists of 8″ x 8″ x 16″ fully grouted CMU blocks with #5 rebar spaced at 24″ which are completely surrounded by exterior bricks. The entire wall sits on top of a 6″ wide concrete slab. The wall pilasters are supported by 18″ diameter piers which are widened towards the bottom. Below is a brief summary of what Engineering Examples did for this project:
We calculated the bearing stress acting at the bottom of the pier and confirmed that it was lower than the allowable bearing pressure provided in the soil report.
We calculated the wind load acting on the wall and on each supporting pilaster. From this, we found the bending moment due to wind acting on each pilaster. Next, we computed the resisting moment due to the passive, lateral soil pressure acting along the entire depth of the pier. Then, we confirmed that the bending moment due to wind was less than the resisting moment due to the soil.
We designed the longitudinal, pier reinforcement in accordance with the minimum steel area requirements outlined in the soil report.
We specified the tie spacing of the pier and pilaster reinforcement based on ACI Code 318-11.
To further strengthen the wall against lateral, wind load, we designed a fully grouted, reinforced bond beam that will be placed on the top coarse of the wall.
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