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MASONS SUPPLY COMPANY
Oregon (800) 537-3407 ♦ Washington (800) 537-6216
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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