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Re: Masonry Cement

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Section 2104.4.6 of the Massachusetts State Building Code (6th Edition)
states "Material Requirement: Neither Type N mortar  nor masonry cement
shall be used as part of the lateral force resisting system."

The masonry subcontractor on a job wants to use  pre-proportioned blend of
masonry cement that meets the requirements of C-150 for the Portland cement
and C-207 for the hydrated lime. The mix (with mason's sand) produces a
masonry mortar that conforms to ASTM C-270 Type S.

Two questions:

Does anyone know why "masonry cement" was put into Section 2104.4.6?

Can the contractor use the pre-packaged mix?

Thanks in advance,

Domenic W. DeAngelo P.E.


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