ASTM A513 Guardrails
ASTM A513 Guardrails
(OP)
Hi everyone,
I've been given a steel shop drawing for guardrails to check. I noticed the steel fab is using 1-1/2" diameter ASTM A513 grade tubes. I looked in my steel manual and could not find this grade of steel. A quick google search for the yield strength gives a range of 30-80 ksi. Anyone use this grade before and know what the yield strength is? I'm trying to see if it would be acceptable to resist handrail loads.
Thanks,
I've been given a steel shop drawing for guardrails to check. I noticed the steel fab is using 1-1/2" diameter ASTM A513 grade tubes. I looked in my steel manual and could not find this grade of steel. A quick google search for the yield strength gives a range of 30-80 ksi. Anyone use this grade before and know what the yield strength is? I'm trying to see if it would be acceptable to resist handrail loads.
Thanks,






RE: ASTM A513 Guardrails
RE: ASTM A513 Guardrails
Ask them to submit mill certificates or at least a purchase order for your documentation, showing the 50 ksi material.
RE: ASTM A513 Guardrails
NYSDOT specs generally require 50 ksi for tubes used as part of a guide rail systems.
RE: ASTM A513 Guardrails
Range of Yield Strength of a few Metals:
Aluminum - 40 to 70 ksi
Bronze - 25 to 100 ksi
Copper - 8 to 110 ksi
Nickel - 20 to 90 ksi
Steel - 30 to 100 ksi
Steel Wire - 40 to 150 ksi
RE: ASTM A513 Guardrails
"ASTM 513 has a Type 1 or 2...the Fy & Fu depend on the alloy (C1010 or C1020), the tube OD & the wall thickness
the following material properties ranges apply
for 1010
Fu - 45 ksi to 48 ksi
Fy - 35 ksi to 40 ksi
for 1020
Fu - 55 ksi to 50 ksi
Fy - 36 ksi to 40 ksi
tubes .75" OD & smaller have the higher strengths & lower elongations (~15%)
.75" OD & larger with heavier walls have the lower strengths & higher elongations (~25%to 35%)
[color red]I'd use 29,000 ksi for E[/red] ???????
hope this helps
Robert Kazanjy"
RE: ASTM A513 Guardrails
RE: ASTM A513 Guardrails
RE: ASTM A513 Guardrails
Never, but never question engineer's judgement