E. CAVITY WALL AIR SPACE AND INSULATION Cavities exceeding the code maximum of 4 ½ inches will require analysis / calculations to be performed for the tie anchors. Cavity walls are designed not only to guide any moisture occurring in the cavity to move downward to the flashing and weep vents, but also to allow a certain flow of air throughout the cavity. Recommend providing a 2 inch minimum clear drainage cavity (not including the insulation) to be effective to allow for proper construction of the wall and to minimize mortar fins, droppings and bridging. Clearly indicate insulation attachment method either mechanically or adhered to masonry backup. Friction fitting rigid insulation between horizontal reinforcement is not an acceptable solution. F. PILASTERS Pilasters (built-up masonry piers integral with walls) should be considered for tall walls, lateral stability and bearing location points for structural members. Layout/location of pilasters should be coordinated between the architect and engineer. Pilasters are an ideal location for wall control joints. G. REINFORCING All masonry walls shall be reinforced vertically and horizontal to resist vertical and horizontal loads as per ASCE 5 & 6. H. FIRE RATING The fire rating properties of the wall should be considered to determine minimum wall thickness. I. FLASHINGS Consultant/Designer show flashing details for installation for lapping / sealing, terminations and end dams, inside corners and outside corners (either field formed or prefabricated), wall to roof line, base flashing and copings. Isometric or 3D drawings shall be used to convey proper detailing. Where the flashing is not continuous, such as over and under openings in the wall and on each side of vertical expansion joints, the ends of the flashing should be extended beyond the jamb lines on both sides and turned up into the head joint at least 1 in. at each end to form a dam. Provide weep vents and Mortar Net at all wall flashings. 3.
E. CAVITY WALL AIR SPACE AND INSULATION Cavities exceeding the code maximum of 4 ½ inches will require analysis / calculations to be performed for the tie anchors. Cavity walls are designed not only to guide any moisture occurring in the cavity to move downward to the flashing and weep vents, but also to allow a certain flow of air throughout the cavity. Recommend providing a 2 inch minimum clear drainage cavity (not including the insulation) to be effective to allow for proper construction of the wall and to minimize mortar fins, droppings and bridging. Clearly indicate insulation attachment method either mechanically or adhered to masonry backup. Friction fitting rigid insulation between horizontal reinforcement is not an acceptable solution. F. PILASTERS Pilasters (built-up masonry piers integral with walls) should be considered for tall walls, lateral stability and bearing location points for structural members. Layout/location of pilasters should be coordinated between the architect and engineer. Pilasters are an ideal location for wall control joints. G. REINFORCING All masonry walls shall be reinforced vertically and horizontal to resist vertical and horizontal loads as per ASCE 5 & 6. H. FIRE RATING The fire rating properties of the wall should be considered to determine minimum wall thickness. I. FLASHINGS Consultant/Designer show flashing details for installation for lapping / sealing, terminations and end dams, inside corners and outside corners (either field formed or prefabricated), wall to roof line, base flashing and copings. Isometric or 3D drawings shall be used to convey proper detailing. Where the flashing is not continuous, such as over and under openings in the wall and on each side of vertical expansion joints, the ends of the flashing should be extended beyond the jamb lines on both sides and turned up into the head joint at least 1 in. at each end to form a dam. 3. Provide weep vents and Mortar Net at all wall flashings.
09174MasonryGuide.docx