2005 NDS SECTION 3.4-7 (C)---CONCEALED HANGERS?
2005 NDS SECTION 3.4-7 (C)---CONCEALED HANGERS?
(OP)
THE 2005 NDS SECTION 3.4-7 SUBSECTION (C)(PAGE 17) STATES: "WHEN CONCEALED HANGERS ARE USED, THE ADJUSTED DESIGN SHEAR, Vr', SHALL BE CALCULATED BASED ON THE PROVISIONS IN 3.4.3.2 FOR NOTCHED BENDING MEMBERS. MY QUESTION IS, WHAT DO THEY MEAN BY CONCEALED HANGERS? THEY ARE NOT REFERRING TO CONCEALED FLANGE HANGERS ARE THEY? THANK YOU IN ADVANCE.





RE: 2005 NDS SECTION 3.4-7 (C)---CONCEALED HANGERS?
RE: 2005 NDS SECTION 3.4-7 (C)---CONCEALED HANGERS?
That would make sense. That would explain the need for the adjusted shear formula.
Thanks
RE: 2005 NDS SECTION 3.4-7 (C)---CONCEALED HANGERS?
Since the load was carried by the top of the bar the effect was similair to a beam that had the material below the top of the bar notched out.
Today it is more common to see partially concealed hangers. A common partially concealed hanger is made up with a top flange,a vertical back plate, a horizontal bearing plate with a vertical stiffner at the bearing plate centerline. A vertical saw kerf is cut in the supported memeber so that it can sit down on the bearing plate. Bolts then may go through the member and vertical stiffner plate.
With a partially concealed hanger the back plate and horizontal bearing plate are left exposed. This type of hanger can also be dapped into the end of the hanger so now steel is exposed. If the member is large enoungh the mmember may be countered bored so that the bolts may be concealed by plugging the counter bores.
RE: 2005 NDS SECTION 3.4-7 (C)---CONCEALED HANGERS?
RE: 2005 NDS SECTION 3.4-7 (C)---CONCEALED HANGERS?
RE: 2005 NDS SECTION 3.4-7 (C)---CONCEALED HANGERS?
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RE: 2005 NDS SECTION 3.4-7 (C)---CONCEALED HANGERS?