jtjc23eng
Civil/Environmental
- Sep 15, 2021
- 14
Hello
My colleagues and I design a lot of items like pipe/equipment support frames and seismic equipment anchorage using ASCE Ch13. Recently, we have been having a debate about when AISC 341 applies for non-building structures. Note we work in California and in seismic design category D.
AISC 341 Scope Excerpt:
The Seismic Provisions for Structural Steel Buildings, hereafter referred to as these
Provisions, shall govern the design, fabrication and erection of structural steel members
and connections in the seismic force-resisting systems (SFRS), and splices and
bases of columns in gravity framing systems of buildings [highlight #FCE94F]and other structures with
moment frames, braced frames and shear walls. Other structures are defined as those
structures designed, fabricated and erected in a manner similar to buildings, with
building-like vertical and lateral force-resisting elements.[/highlight] These Provisions shall
apply to the design of seismic force-resisting systems of structural steel or of structural
steel acting compositely with reinforced concrete, unless specifically exempted
by the applicable building code.
Questions:
1. Does AISC 341 apply to equipment seismic restraints? This one I think is an easy no...
2. Would a 4 post small(say dim 3'x6'x4') frame serving as a heavy duty pedestal qualify under the highlighted scope? It arguably has all those listed features but it is small.
3. Would a 2 post frame qualify under the highlighted scope? I would think anything (2) posts or less easily would be considered NOT similar to a building.
4. How about a small (3'x4'x7') storage rack?
Please let me know your thoughts and any other tips you guys typically use to distinguish whether AISC 341 applies.
Thanks!
My colleagues and I design a lot of items like pipe/equipment support frames and seismic equipment anchorage using ASCE Ch13. Recently, we have been having a debate about when AISC 341 applies for non-building structures. Note we work in California and in seismic design category D.
AISC 341 Scope Excerpt:
The Seismic Provisions for Structural Steel Buildings, hereafter referred to as these
Provisions, shall govern the design, fabrication and erection of structural steel members
and connections in the seismic force-resisting systems (SFRS), and splices and
bases of columns in gravity framing systems of buildings [highlight #FCE94F]and other structures with
moment frames, braced frames and shear walls. Other structures are defined as those
structures designed, fabricated and erected in a manner similar to buildings, with
building-like vertical and lateral force-resisting elements.[/highlight] These Provisions shall
apply to the design of seismic force-resisting systems of structural steel or of structural
steel acting compositely with reinforced concrete, unless specifically exempted
by the applicable building code.
Questions:
1. Does AISC 341 apply to equipment seismic restraints? This one I think is an easy no...
2. Would a 4 post small(say dim 3'x6'x4') frame serving as a heavy duty pedestal qualify under the highlighted scope? It arguably has all those listed features but it is small.
3. Would a 2 post frame qualify under the highlighted scope? I would think anything (2) posts or less easily would be considered NOT similar to a building.
4. How about a small (3'x4'x7') storage rack?
Please let me know your thoughts and any other tips you guys typically use to distinguish whether AISC 341 applies.
Thanks!
