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Bolt Specifications for Steel Strap TCB Tie-Down
Question
State
KS
Description Text
We have a question
submitted by one of our contractors regarding which bolts are acceptable for
use in concrete safety barrier anchorage applications with tie down straps. Can
you take a look at the attached information submitted to KDOT and the highlighted
version of our Standard Drawing and let us know if you would have any concerns
using ASTM A325 bolts in lieu of ASTM A449 bolts? I quickly reviewed the
properties and they look virtually identical to me, but Scott King pointed out
the different materials can sometimes be sensitive to temperature or may have
different shear strengths so I wanted to check with you and get your thoughts.
System Performance Evaluation
System Types
Portable Barriers
Applications
System Features
Date
March 3, 2015
Previous Views (49) Favorites (0)
Attachment
anchor detail.pdf
Attachment
bolts for straps.pdf
Response
Response
(active)
ASTM A449 is virtually identical in chemistry and strength to
ASTM A325
and SAE J429 grade 5. However, A449 is more flexible in the sense that it
covers a larger diameter range
and is not restricted by a specific configuration.
Thus, either spec can be used in this application.
Date
March 4, 2015
Previous Views (49) Favorites (0)
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