MASCO Catalog: Concrete Forming & Accessories

143 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 Combiform Rail Combiform screed rail and form is used in the production of flat slabs. The Combiform screed rail is manufactured from plain sheet metal and a strip of polyethylene plastic. Available in 7.2' lengths in various heights up to 5-3/4" (125mm). Combiform functions both as a form and a screed rail on any type of prepared base. Being a stay-in place form, the Combiform will help to control shrinkage cracks which will occur along the plastic strip. The Combiform screed rail is machine made to close tolerances. The side of the rail is perforated to allow easy concrete flow and pass through of reinforcing steel up to 7/8" (22mm) in diameter, depending on size. For installation grade pies are placed on each end and 3' centers. Combiform is set to grade leaving 1-1/2" gap underneath to allow concrete to fill void (when initially setting, keep concrete cover to maximum 1/2" above combiform flange). When pouring slab vibration along edge is recommended to fill void. For more installation techniques call Masons. Drop Extender Drop extender is a removable plastic strip that attaches to the normal plastic strip, in the top of the screed rail to provide a 1 3/16" (30mm) concrete cover. Combiform Selection Chart MUST VIBRATE DROP EXTENDER 1-3/16" CONCRETE COVER Tolerances: Length + 3/16". Height + 1/8", - 1/16" TYPICAL CONCRETE PAD APPLICATION SCREED RAIL No. Size Rec Slab Thickness Wt/Pc (lbs) Pcs/Ctn CF C45 1-3/4" x 7.2' 3"- 4" 4.4 182 CF C65 2-1/2" x 7.2' 4" 5.1 182 CF C85 3-3/8" x 7.2' 5" 6.2 182 CF C105 4-1/8" x 7.2' 6" 7.7 150 CF C125 5" x 7.2' 7" 9.3 150 CF C145 5-3/4" x 7.2' 8"+ 11.0 100 Description Height H-1 in. H-2 in. H-3 in. Width Weight/Bundle lbs. CF C45 1-3/4" 1.2" 3.5" 966.0 CF C65 2-1/2" 1.1" 1.8" 4.1" 1,122.0 CF C85 3-3/8" 1.2" 1.9" 2.6" 4.5" 1,256.0 CF C105 4-1/8" 1.3" 2.1" 3.5" 5.1" 1,285.0 CF C125 5" 1.3" 2.5" 4.3" 5.3" 1,483.0 CF C145 5-3/4" 1.3" 3.0" 5.0" 6.3" 1,177.0 No. Size Wt (lbs) CF EXT 1-3/16" x 7.2' 1.1 SLAB/HORIZONTAL SCREEDS