F-44 Thin Slab Ferrule Insert is a specially designed insert for use where the depth of
embed-ment is extremely limited and where there is a requirement for limited capacity in both tension and shear.
Depending on region, the F-44 will be furnished with either two struts welded to the bottom of the ferrule or one
strut looped around the ferrule (see sketch).
Minimum spacing between insert is twice the minimum corner distance.
F-44 Thin Slab Ferrule Insert Selection Chart | |||||
Bolt Diameter and Threads per Inch |
Safe Working Load Tension |
Maximum Bolt Engagement |
A | B | |
1/4" --20NC | 450 lbs. | 3/4" | 1-1/4" | 9/16" | |
3/8" -- 16NC | 450 lbs. | 3/4" | 1-1/4" | 11/16" | |
1/2" -- 13NC | 900 lbs. | 1" | 1-3/8" | 13/16" | |
5/8" -- 11NC | 1,000 lbs. | 1-1/8" | 1-3/8" | 13/16" | |
3/4" -- 10NC | 1,600 lbs. | 1-1/8" | 1-5/8" | 1-1/16" | |
7/8" -- 9NC | 1,600 lbs. | 1-1/8" | 1-5/8" | 1-1/16" | |
1" -- 8NC | 2,200 lbs. | 1-1/8" | 1-5/8" | 1-1/16" |
Safe Working Load provides a factor of safety of approximately 3 to 1 in 3,000 psi normal weight concrete.
Safe Working Load are based on 1/2” setback from face of concrete.