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Valmont Pole materials S-22

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djrexy

Structural
Feb 12, 2013
5
I was performing an analysis on an existing light pole using Tower TNX. I had a hard time understanding the properties of specified materials in the as-built drawings.
Materials S-22 for the pole and S-128 for plate. Anyway after going back and forth by selecting grade 36 (just for safety) I finally got an email response that summarized the materials as following:

-------------- Quote ---------------

"Valmont Material Properties

Anchor Bolts

M-1 is a general tolerance spec for Valmont's T-Pole products. As it applies to anchor
bolts it would have: A) Overall anchor bolt lengths be +1" -0" B) The threaded
portion +1" -0" C) The galvanized length +6"-0"There are other items for the templates
and base plate over all width of the plates, hole size and location tolerances etc. but the
anchor bolt tolerances are as I listed above. I hope this helps you out. Let me know if
you need a copy of M-1.

Yes, the material Valmont spec S-23 is ASTM A615 Grade 75 with Charpy values of 15
ft-lbs@-20 F. The tensile would be 100 ksi. The anchor bolt nuts would be A563 Grade
C or better.

Plate

The material specs that you called out are really common Valmont specs. S-22 is ASTM
A572 Grade 65 material with silicon control for galvanizing and Charpy Values of 15 Ft-
Lbs @ -20F on a per heat basis. The S-128 gives purchasing a choice between A633
Grade 60 or A871 Grade 60 both with the same Charpy requirements as S-22. There is
no silicon control in these size plates. One item to note on the S-128 is that the yield
strength goes down to 55 ksi if the thickness is over 4" (4" is still grade 60).

S-29 is ASTM A-633 Grade E. It has Charpy Values of 15 ft-lbs @ -20F (per heat) and
mill reports for chemistry and mechanical properties. The yield strength is 60.0 ksi for
thicknesses 1.5" to 4" If the thickness is over 4" then the yield is reduced to 55.0 ksi. The
S-128 material is similar except it allows purchasing the choice of the A-633 material or
an equivalent A588 material ("Weathering steel"). 99.5% of the time if the structure is
galvanized purchasing would use the S-29 option. "

------End Quoting ----------


While being pleased of getting this information and solving my problem I do have difficulties in VERIFYING the accuracy of this info. Does anyone know for sure that S-22 is ASTM A572 Grade 65 material and S-128 is A633 Grade 60 material? Where can I OFFICIALLY find/check such information?
 
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If you got your information from Valmont, I would trust what they say. Obviously, to me, the S-22 and S-128 nomenclature is internal to Valmont detailers. Valmont normally does not only the design, but the detailing and construction.

You could always verify this with a call to their technical department and talk to one of the engineers there.

Mike McCann
MMC Engineering
 
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