AISC Simple Shear Connection?
AISC Simple Shear Connection?
(OP)
I am looking at designing a connection and I am beginning to become a little confused. Currently I am looking at a simple double angle shear connection with 2-3/4” dia bolts placed in SSL holes. The connecting angles will be 2-L4x4x5/16”x8-1/2”. I am trying to back figure the capacity of the angle capacity found in table 10-1 (page 10-23) of the AISC 13th edition manual.
For some reason I can’t seem to get the same answer they are getting for the capacity of the connection (I calculate 42.3 kips and they calculate 40.8kips). What parameters are they using to set up these charts? What size angle L4x3-1/2” or L4x4? What size of holes are they using, STD vs SSL? Also, it appears as if block shear is controlling the connection is this correct or am I just missing the failure mode?
For some reason I can’t seem to get the same answer they are getting for the capacity of the connection (I calculate 42.3 kips and they calculate 40.8kips). What parameters are they using to set up these charts? What size angle L4x3-1/2” or L4x4? What size of holes are they using, STD vs SSL? Also, it appears as if block shear is controlling the connection is this correct or am I just missing the failure mode?






RE: AISC Simple Shear Connection?
RE: AISC Simple Shear Connection?
(0.6/2)*58*(5.5-(2*(13/16+1/16)))*(5/16)*2=40.8
RE: AISC Simple Shear Connection?
http://www.FerrellEngineering.com
RE: AISC Simple Shear Connection?
I have a 3 bolt connection with ¾” diameter bolts. I am using Leh = 2 in (1.75 calculated) and Lev = 1.5 in. The connected beam is a W18x35. I calculated an Agv=2.25 in2, Ant=0.395in2 and Anv=1.59in2 for Rn/Omega = 43.9 kips. The chart on page 10-22 gives Rn/Omega = 0.3*138=41.4 kips.
I used standard sized holes and no additional reductions to Lev (unlike the ¼” reduction to Leh). What variables are they using to calculate the values given in the table?
RE: AISC Simple Shear Connection?
RE: AISC Simple Shear Connection?
My actual Leh was 2" and I was using the values for 1-3/4" because I thought you needed to reduce the value yourself. When I ran the hand calc I was using the full 1-3/4" when I should have been using 1-1/2" to get the values in the chart. No wonder why I couldn't get it to work out exactly.