ASD - 6 kips LRFD - 10 kips for stair
ASD - 6 kips LRFD - 10 kips for stair
(OP)
Dear Sir / Madam,
Could you provide any comments about Minimum Strength of Connections according to:
- ASD - it should be proportioned to 6 kips and
- LRFD - it should be proportioned to 10 kips.
How to use these norms for Stairs calculations and especially for:
1. tread's connections to stringers and
2. post rail's to stringer and
3. stringers to stringers?
These norms are absent in ASCE 7-98 Minimum Design Loads for Buildings and Other Structures.
Sincerely,
Could you provide any comments about Minimum Strength of Connections according to:
- ASD - it should be proportioned to 6 kips and
- LRFD - it should be proportioned to 10 kips.
How to use these norms for Stairs calculations and especially for:
1. tread's connections to stringers and
2. post rail's to stringer and
3. stringers to stringers?
These norms are absent in ASCE 7-98 Minimum Design Loads for Buildings and Other Structures.
Sincerely,






RE: ASD - 6 kips LRFD - 10 kips for stair
RE: ASD - 6 kips LRFD - 10 kips for stair
thank you for answer!
The same time, please, take a look on the comentary for 13-th edition of AISC manual. They are plaeing a game - for next edition they will put it up site doun.
Let me ask you about max. spacing for bolts. Some fabricators makes bolted tread connections to the stringers(McNICHOLOS CO. provides treads with bolt specing c/c 7")
For example we use for stringers MC12X10.6 (thk. of web 3/16"). In that case max. spacing will be 3/16" x 24 = 4.5".
What should I do - to follow AISC standard and to take stringer with thicker web or to discegard standard?
Sincerely,
RE: ASD - 6 kips LRFD - 10 kips for stair
12 inches is the limit.
RE: ASD - 6 kips LRFD - 10 kips for stair
Maybe the answer is the AISC specification deals with structural steel, and this application, stairs and treads, is not "structural steel," so this requirement does not apply.
RE: ASD - 6 kips LRFD - 10 kips for stair
RE: ASD - 6 kips LRFD - 10 kips for stair
I'm pretty good at grammar, and I know what "and" and "or" mean. I still maintain that you can't exceed either of those two.
RE: ASD - 6 kips LRFD - 10 kips for stair
RE: ASD - 6 kips LRFD - 10 kips for stair
RE: ASD - 6 kips LRFD - 10 kips for stair
Please, confirm:
1. the spacing shall not exceed 4.5" for web's thk. 3/16" (MC12x10.6)
or
2. we should take stringer with thicker web.
Sincerely,