MASCO Catalog: Concrete Forming & Accessories

26 MASONS SUPPLY COMPANY Oregon (800) 537-3407 ♦ Washington (800) 537-6216 Clackamas | Eugene | West Eugene | Hillsboro | Medford | Portland | Salem | Ridgefield | Seattle | Tacoma | Woodinville M A S C O . N E T VERTICAL FORMING SYSTEMS Jahn ® Forming System Preparation: Gang drilling the plywood is the only preparation required. Holes need to be drilled 1/8" larger than the snap tie head. Normally a 9/16" diameter drill bit will be required. We recommend you drill a maximum 5 plywood panels.The 5/8" take-up of the eccentric on the Jahn "A" Bracket allows a snap tie with a L&W dimension of 4-3/4" to be used with a 5/8" or 3/4" plywood. The 5/8" take-up on the "C" bracket allows it and 8 1 /4" snap ties to be used on 5/8" plywood. Snaptie Spacing and Rate Placement: The most common snap tie spacings being used with the Jahn Forming System are shown below. For different rates or pour and/or other tie spacing, contact Masons Supply. Refer to the back cover for addresses and phone numbers. Gang Drilling of Plywood 12" vertical x 24" horizontal Snaptie Spacing. 16" vertical x 24" horizontal Snaptie Spacing. 12" vertical x 12" horizontal Snaptie Spacing. Plywood Used Strong Way (Face Grain Parallel to Spacing) Notes: The above recommendations are based on the use of 3/4" Plyform Class I, and 2x4 S4S studs (Douglas Fir-Larch, Southern Pine or equal having a minimum allowable fibre stress of 1,200 psi). Design is based on all formwork members being continuous over four or more supports. Normal weight concrete made with type 1 cement, no admixtures or pozzolan, slump no more than 4 inches and vibration limited to 4 lineal feet or less. 6" 12" 12" 12" 12" 12" 12" 6" 12" 24" 12" 4'-0" 4'-0" 4'-0" 12" 24" 12" 8" 8'-0" 16" 16" 16" 16" 16" 8" 8'-0" 12" 12" 12" 12" 12" 12" 12" 12" 12" 12" 12" 12" 8'-0" 12" SNAPTIE SYSTEM