MASCO Catalog: Concrete Forming & Accessories

141 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 Adjustable Chairs Standard screed chairs and pipe holders are available sizes ranging for a 3-3/4" slab to 13" slab. These chairs have the "butterfly" leg design for added strength, and yet this chair can be placed over and beside rebars for easiest screed pipe alignment. The table below shows the range of adjustment (minimum and maximum slabs) for each size chair and pipe holder. Place screed chairs at 4'-0" maximum under screed pipe. On special order, chairs can be made with galvanized wire, electro-galvanized, or provided with stainless dowels between wire and form face. Stock pipe holders are made for 1" ID pipe. WARNING: Do not use to support the weight of finishing (screed) machines. NOTE: Height based on 1" ID pipe. Heavy Duty Chairs Heavy duty screed chairs and pipe holders are available sizes ranging for a 4-3/8" slab to 16-7/8" slab. The table shows the range of adjustment (minimum and maximum slabs) for each size chair and pipe holder. Place screed chairs at 2'-0" maximum under screed pipe. On special order, chairs can be made with galvanized wire, electro-galvanized, or provided with stainless dowels between wire and form face. Stock pipe holders are made for 1-1/4 and 1-1/2" ID pipe. SWL is 800 lbs. NOTE: To obtain actual slab limitations, you must add pipe O.D. to above dimensions. Diameter Size Height Size Height Min Max 1/2" No. 1 2-1/2" No. 0 1-1/2" 3-3/4" 4-1/2" 1/2" No. 2 3-1/2" No. 2 4" 5-1/4" 7-1/2" 1/2" No. 3 5" No. 4 8" 9-1/4" 13" Slab Thick Pipe Holder Chair Base Screed Support Selection Chart Heavy Duty Screed Support Selection Chart Slab Thick G-14 Pipe Holder G-16 Chair Base Diameter Size Height Size Height Min Max 1" No. 7 3-1/2" No. 4 4-1/4" 4-3/8" 6-7/8" 1" No. 8 5-1/2" No. 5 6-3/4" 6-7/8" 10-5/8" 1" No. 9 8-1/2" No. 6 9-3/4" 9-7/8" 16-7/8" Typical Application Screed Board G-1 Pipe Holder G-2 Screed Chair Base Height SLAB/HORIZONTAL SCREEDS