Control Joints (CJ) are 1-piece joints designed to relieve stress and minimize cracking; they accommodate initial stucco shrinkage and minor thermal movement. The Control Joints are required to form membrane panels no larger than 100 sf for ceilings and 144 sf for walls. Expansion Joints (EJ) are 2-piece joints designed to accommodate a full break through the structure across dissimilar surfaces or to deal with some minor structural movement.
Control Joints Versus Expansion Joints
AMICO Control Joint (#15 Joint or M-Type)
Designed to provide for movement to accommodate expansion and contraction caused by initial stucco shrinkage and minor thermal movement. Produced in galvanized steel and zinc alloy in 10’ lengths. Pre-taped to ensure a clean joint.
|3/8"||Galvanized||24||49 lbs.||40||1960 lbs||CJ15G3810|
|1/2"||Galvanized||24||66 lbs.||40||2640 lbs||CJ15G5010|
|1/2"||Zinc||24||50 lbs.||40||2000 lbs||CJ15Z5010|
|5/8"||Galvanized||24||65 lbs.||40||2640 lbs||CJ15G5810|
|5/8"||Zinc||24||58 lbs.||40||2320 lbs||CJ15Z5810|
|3/4"||Galvanized||24||71 lbs.||40||2840 lbs||CJ15G7510|
|3/4"||Zinc||24||61 lbs.||40||2440 lbs||CJ15Z7510|
|3/4"||Stainless||24||71 lbs.||40||2840 lbs||CJ15SE7510|
|7/8"||Galvanized||24||83 lbs.||40||3320 lbs||CJ15G7810|
|7/8"||Zinc||24||71 lbs.||40||2840 lbs||CJ15Z7810|
Griplock Control Joint (#XJ15 Joint )
Similar to the M Control Joint except the J design provides locking of the stucco to the edge of the joint. This design helps reduce stucco separation at the edge of the joint when stucco is forced under the J flange. Produced in 10’ lengths. Griplock J comes pre-taped to ensure a clean joint.
|1/2"||Galvanized||24||70 lbs.||40||2800 lbs||CJXJ15G5010|
|1/2"||Zinc||24||61 lbs.||40||2440 lbs||CJXJ15Z5010|
|3/4"||Galvanized||24||77 lbs.||40||3080 lbs||CJXJ15G7510|