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[SEAOC] Type M vs Type S mortar

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We routinely specify Type M mortar on jobs. No one has ever

We recently completed drawings for a high school in Colorado. We used
our standard specification for mortar and have received a request for
change to Type S. The contractor must not see it often. But he *did*
bid the job from plans that included the Type M spec. He will need to
credit my client.

Aside from strength what are the relative benefits of the two types of



Mark E. Deardorff, SE
Deardorff & Deardorff, Inc.
San Diego, CA