MASCO Catalog: Concrete Forming & Accessories

241 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 GENERAL & TECH INFO CHARTS Chart for Determining Required Quantities for Form Ties Form Tie Calculator Based on 10,000 sq. ft. of Wall Area or 20,000 sq. ft. of Form Contact Area. Form Tie Spacing Form Ties Required 16" x 16" = 1.77 sq. ft. 5,650 24" x 24" = 4.0 sq. ft. 2,500 24" x 32" = 5.33 sq. ft. 1,877 32" x 32" = 7.11 sq. ft. 1,407 32" x 48" = 10.67 sq. ft. 938 48" x 48" = 16 sq. ft. 625 60" x 60" = 25 sq. ft. 400 NC THREADED BOLT SELECTION CHART ASTMA-307 BOLTS ASTMA-325 OR A-449 BOLTS Nominal Bolt Diameter and Threads per Inch Tension Shear Tension Shear 1/4" - 20 625 lbs 350 lbs 1,250 lbs 725 lbs 3/8" - 16 1,500 lbs 900 lbs 3,100 lbs 1,800 lbs 1/2" - 13 2,800 lbs 1,700 lbs 5,600 lbs 3,400 lbs 5/8" - 11 4,500 lbs 2,700 lbs 9,000 lbs 5,400 lbs 3/4" - 10 6,600 lbs 4,000 lbs 13,300 lbs 8,100 lbs 7/8" - 9 9,200 lbs 5,600 lbs 18,400 lbs 11,300 lbs 1" - 8 12,000 lbs 7,400 lbs 24,200 lbs 14,900 lbs 1-1/8" - 7 15,200 lbs 9,400 lbs 26,700 lbs 16,400 lbs 1-1/4" - 7 19,300 lbs 12,000 lbs 33,900 lbs 21,000 lbs 1-1/2" - 6 28,100 lbs 17,500 lbs 49,100 lbs 30,600 lbs Safe working loads shown provide a factor of safety of approximately 3 to 1 (ultimate to SWL). Shear SWL's assume that the threads are included in the shear plane. 1/4"-20, 3/8"-16 and 1/2"-13 bolts are not recommended for use as structural fasteners. Above information is taken from material provided by Industrial Fastener Institute. Permanent connections in precast construction are normally made with either ferrule inserts or COREWALL slotted inserts using National Course (NC) threaded bolts. These NC Threaded bolts are normally not supplied by Masons Supply. However, as a convenience to the designer, the following chart listed. NC Threaded Bolt Capacities