Bearing Loads for Unistrut Channels

 Bearing Load on Channel 3
Bearing Load on Channel 2Bearing Load on Channel 1
Standard 1-5/8" Wide Channel
ChannelBearing Length 1-5/8" (41 mm)
Maximum Allowable Load
lbs (kN)
Bearing Length 1-5/8" (41 mm)
Maximum Allowable Load
lbs (kN)
Bearing Length 3-1/4" (82 mm)
Maximum Allowable Load
lbs (kN)
P10006,700  (29.80)3,100  (13.79)7,700  (34.25)
P11003,500  (15.57)1,700  (7.56)4,000  (17.79)
P20002,500  (11.12)1,200  (5.34)3,000  (13.34)
P30006,700  (29.80)3,200  (14.23)7,700  (34.25)
P33006,800  (30.25)3,200  (14.23)7,800  (34.70)
P40002,600  (11.57)1,200  (5.34)3,000  (13.34)
P41003,500  (15.57)1,800  (8.01)4,100  (18.24)
P44007,300  (32.47)3,400  (15.12)8,400  (37.37)
P45207,300  (32.47)3,400  (15.12)8,400  (37.37)
P50006,500  (28.91)3,000  (13.34)7,500  (33.36)
P55006,600  (29.36)3,100  (13.79)7,600  (33.81)
1-1/4" Wide Channel
ChannelBearing Length 1-1/4" (32 mm)
Maximum Allowable Load
lbs (kN)
Bearing Length 1-1/4" (32 mm)
Maximum Allowable Load
lbs (kN)
Bearing Length 2-1/2" (63.5 mm)
Maximum Allowable Load
lbs (kN)
A10003,700  (16.46)1,700  (7.56)4,300  (19.13)
A33003,800  (16.90)1,700  (7.56)4,300  (19.13)
13/16" Wide Channel
ChannelBearing Length 13/16" (21 mm)
Maximum Allowable Load
lbs (kN)
Bearing Length 13/16" (21 mm)
Maximum Allowable Load
lbs (kN)
Bearing Length 1-5/8" (41.3 mm)
Maximum Allowable Load
lbs (kN)
P60001,000  (4.45)500  (2.22)1,200  (5.34)
P70001,000  (4.45)500  (2.22)1,200  (5.34)

Notes:

  1. Applies to steel channels only.
  2. Loads are calculated based on 2007 Specification for the Design of Cold Formed Steel Structural Members published by AISI.