Masonry Magazine January 1979 Page. 22
6
FRICTION FIT
METAL COPING
SEALANT
3/16" (4.8 mm) METAL TIES
HORIZONTAL REINFORCEMENT
VERTICAL REINFORCEMENT
2 (51 mm) MINIMUM CAVITY
COUNTER FLASHING
BASE FLASHING
STEEL ANGLE
LINTEL
WEEP HOLES
CAULKING
REINFORCED CMU
LINTEL
FLASHING
DOVETAIL ANCHOR
SLOT AND
14" (6.4 mm) FLEXIBLE
DOVETAIL ANCHOR @ 16"
(406 mm) O.C.
HORIZONTALLY
SOFT COMPRESSIBLE MATERIAL
PREFABRICATED
JOINT REINFORCEMENT
Reinforced Parapet Wall
FIG. 14
CAULKING
FLASHING
WEEP HOLES
Double Hung Wood Window
FIG. 16
3/16" (4.8 mm)
METAL Z TIES
FLASHING
POLYETHYLENE
BOND BREAK
WEEP HOLES
@24" (610 mm) 0.C.
3/16" (4.8 mm)
METAL Z TIES
FLASHING
WEEP HOLES
@24" (610 mm) O.C.
Foundation Details
FIG. 15
Horizontal Expansion Joints
Cavity walls are successfully used as curtain walls in concrete- and steel-frame buildings. When cavity walls are so used, the inner masonry wythe is usually supported by the frame at each floor level and laid to the column faces. The outer wythe, supported by shelf angles, is tied to the structure by metal ties to the inner masonry wythe and the building frame. The shelf angle, which supports the outer wythe of masonry at each floor, can be secured to the spandrel in several ways. Care should be taken to insure proper anchorage and shimming of the angle to prevent deflections which might induce high concentrated stresses in the masonry. Angles should be designed so that total deflections are less than 1/16 in. (1.6 mm). Even if galvanized shelf angles are used, continuous flashing should be installed. Regardless of the type, shelf angles should not be installed as one continuous piece. Provide a space at intervals to permit thermal expansion and contraction to occur without damage to the wall.
Where shelf angles are used in this manner, it is suggested that horizontal expansion joints be placed at shelf angles, see Fig. 8, Technical Notes 21 Revised. This is particularly important in concrete frame buildings. The joints should be sealed with a permanently elastic sealant of a color which will closely match the mortar joints.
PARAPETS
Of all the masonry elements used in buildings, probably the most difficult to adequately detail is the parapet wall. Designers have tried many different ways to design parapets to minimize cracking, leaking, and displacement. Experts generally agree that the only sure