Assertion: mortar's strength | /r/HasProperty | required
Facets:
Source sentences:
text: Type M mortar is the highest strength mortar (minimum 2500 psi) and should only be used where significant compressive strength is required.
text: Like type M mortar, use Type "S" for below-grade applications where greater strength is required, and lighter weight projects such as home improvement projects requiring greater mortar strength.