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A992 yield strength

A992 yield strength

A992 yield strength

(OP)
For really simple structures I still tend to use the ASD method.  Simple beam center support moment = PL/4, stress = M/S, FOS = stress / yield, etc.  Now that most structural steel is rolled as A992, is the correct yield strength 50ksi?  I have seen some people use 42ksi.

RE: A992 yield strength

Yes

RE: A992 yield strength

Just specify ASTM A992, Grade 50.

RE: A992 yield strength

(OP)
Where does the 42ksi come from?  LRFD?

RE: A992 yield strength

I don't believe that there is a Grade 42 for A992...just 50.

A link:

A992 Link

RE: A992 yield strength

There are typically 4 main types of steel being used now in building design:

A992 (50ksi):  Beams, WTs, etc (rolled shapes)

A36 (36ksi):  Plate, Angles, Connection Material (note these can also generally be obtained in A572 G50 but I would check with the steel supplier).

A500 Grade B (46ksi):  Rectangular HSS sections.

A500 Grade B (42ksi):  Round HSS sections.

So probably you are seeing round HSS sections with a Fy of 42.  There are also several other fairly common types (A53 GrB for Pipe, F1554 for Anchor Rods etc).  Generally you can find a table at the beginning of the steel manual directing you to what is commonly used for what.  In 13th ed. manual, see Table 2-3 on page 2-39.

RE: A992 yield strength

A 572 comes in Gr. 42 and 50.  A 992 does not.  People who just blindly substitute "A 992" everywhere they used to write "A 572" are going to run into trouble with Gr. 42 and, I believe, with shapes other than wide-flange beams.

Hg

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RE: A992 yield strength

LOL, mine was the most concise!!

RE: A992 yield strength

is LOL one word or three?

Do you read LOL as "loll", "ell-oh-ell" or "laugh out loud" in your mind?  I wonder...

RE: A992 yield strength

I read it as "ha ha"

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