The PCI Spec, Rev 2.2, page 162 calls for two "tangs" on the horizontal datum measuring .020" vs old ISA standard of .040". I would assume these are for grounding integrity (?), therefore, may be omitted if not needed. We are encountering issues of boards "rocking" in the PCI backplane connectors when secured in some computers which I suspect is contributed to by this difference as our bracket are designed using the .040 dimension.
Specifically, can these "tangs" be omitted if grounding is unnecessary?
Is .020" the preferred dimension?
Please confirm that horizontal datum is actually "inside" the bend on page 162 (Under the mounting flange).
Al Keyworth
CAD Manager
Measurement Computing Corp.
16 Commerce Blvd.
Middleboro, MA 02346
Voice: (508) 946-5100 x289
Fax: (508) 946-9500
email: al.keyworth@computerboards.com