Masonry Magazine April 1982 Page. 19
TERRA
TERRA
COTTA
COPING
FULL
COLLAR
JOINT
Z-TIES
FLASHING AND
COUNTER-FLASHING
RIGIO
INSULATION
MASONRY
NAIL
SEALANT
AND
BACKING
ROD
ANCHOR
BOLT
FULL COLLAR
JOINT
FASCIA GRAVEL STOP
BATT INSULATION
FIRE CUT
Coping for Solid Masonry Parapet
FIG. 3
Masonry Bearing Wall Coping
FIG. 5
While the flashing for caps and copings may have a different prime function from normal useage, it is still necessary to provide weepholes immediately above the flashings to convey the water collected on the flashing out of the wall, unless exterior flashing is used. Weepholes should be spaced at a maximum of 24 in. (600 mm) o.c., unless wicks or hidden flashing are used. Then the spacing should be reduced to 16 in. (400 mm) o.c. maximum.
Drips. Regardless of the material selected for caps or copings, drips should be provided. When brick caps and copings are used, the drip is the lowest point on the element, as shown in Figs. 4 and 7. When metal caps and copings are used, the drips can be formed by bending the material outward from the face of the wall, see Figs. 2, 5 and 6. With heavy guage metals, stone concrete or terra cotta caps and copings, the drip is either cut or formed in the bottom of the projection beyond the face of the wall, as shown in Figs. 1, 3, and 7. This drip can be in several configurations, and still perform. The important thing is that a drip be provided and that the inner lip be at least 1 in. (25 mm) from the face of the wall as shown in Figs. 1, 3, and 7.
Connections. Elements other than caps and copings require careful consideration of their connection to the structure for the structural stability of the element. In the case of caps and copings, the structural stability becomes secondary to the climatic considerations, such as moisture and temperature. Connections which are usually provided for structural purposes are generally rigid. Because of the diversity of materials used for caps and copings in conjunction with brick masonry walls, the connection in some cases should be of a flexible nature. Brick masonry, concrete, stone and terra cotta, respond to climatic conditions in much the same manner, and rigid connections can be used with little consideration of differential movement. Because of the dissimilarity of metal and brick masonry in their reaction to climatic conditions, the connections require some flexibility.
Light gauge metal copings as shown in Figs. 5 and 6 should be nailed to the wall, and horizontal slots should be provided at nailing locations to prevent buckling of the coping due to thermal expansion. Metal caps and copings require an extension down the face of the wall, 4 in. (100 mm) min., and a sealant between the metal and the wall to prevent wind uplift and water penetration. Care should be taken to seal each penetration of the metal cap or coping where it is exposed to the exterior environment.
ROWLOCK
COPING
Z-TIES-
FULL
COLLAR
JOINT
FLASHING AND
COUNTER-FLASHING
RIGIO
INSULATION
MASONRY
NAIL
SEALANT
AND
BACKING
ROD
Rowlock Coping on Solid Masonry Parapet
FIG. 4
FASCIA GRAVEL STOP
RIGID
INSULATION
Masonry Cavity Wall Coping
FIG. 6
ANCHOR
BOLT
METAL
TIE
3