Channel Members:
(a) The lug angles and their links to the gusset plate shall develop strength at least 10% more than the force not accounted for by the direct connection of the member.
(b) An attachment of lug angles to the main (channel) member shall be able to develop 20% more than this force.
(c) Not less than two bolts (rivets) should be used to attach the lug angle to the gusset (or supporting member).