Masonry Magazine April 1966 Page. 28
details
Finish grade
Suggested drainage provisions and backfilling procedures.
Finish grade
Place about 1 cu. ft. of crushed stone or gravel at each weep hole in take.
Place concrete for footing and key against undisturbed natural soil.
FIGURE 2
Weep holes formed by embedding 4" min. dia. pipe in the wall. Space weep holes about 5 o.c. horizontally and about 8 above the finished grade.
Finish grade.
Place bottom of footing below the frost line.
Where recommended in text, water-proof back face of wall with 3½" coating of cement plaster.
Longitudinal back drain extending the full length of the wall and connected to suitable outlets beyond the ends of the wall. Use 4" min. dia. drain tile and place crushed stone or gravel around tile to form drain. Where backfill will consist of impermeable materials and will contain excess amounts of water, additional gravel backfill should be used to form a vertical layer covering the back of the wall and extending to within about 1' from the top.
Where soil under footing consists of silt or soft clay, place a 4 to 6" layer of well-compacted sharp-grained sand or sand and gravel under footing.
FIGURE 3
Vertical reinforcement
Dowel
Note: Clean out mortar droppings and form over opening before filling cores.
Full cut headers used in first course to form continuous cleanout opening.
FIGURE 4
Note: Slots may be cast into the unit when molded or cut out with a masonry saw after unit has been cured.
Alternate cleanout detail.
7%
AA
Standard wall unit modified for use as bond beam unit.
Full or half brick as required to support header units.
Place wire loop extending into core in mortar joints as wall is laid up. Loosen before mortar sets. After inserting bar pull wire loop and bar to proper position and secure wire by tying free ends.
15%
7% or 11%
a) Slotted unit.
b) Unit with section removed
Typical shear-resisting control joints for concrete masonry walls.
Calking
FIGURE 6
Calking
Line one side of co with building paper before filling core.
Calking
Alternate courses-
Calking
Alternate courses,
10000000000
FIGURE 5
Calking
NATIONAL CONCRETE MASONRY ASSOCIATION
2009 14th Street North Arlington, Virginia 22201
Calking-