If you look at the video on http://www.masonryworktools.com/bricklayingandmasonry.html you will see the mortar used in that video is Quickrete brand, they do have a type "N" (nonstructural)and a type "S" (structural) we used type "S" on the Walgreens in the video and it meets the UBC requirements. Also on this project we used type "S" Spec Mix Brand. If the bag says on it conforms to the ASTM C 270 it should be fine.
