PE/SE Engineering Service · California
Seismic Anchor Calculations — Stamped, Code-Compliant, On Time
PE/SE stamped seismic anchor calculations per ASCE 7-22 Chapter 13 and ACI 318-19 Chapter 17. 2025 CBC compliant. Standard scopes returned in 5–7 business days — urgent same-week available.
What are seismic anchor calculations?
Seismic anchor calculations determine the earthquake forces on a piece of equipment and prove the anchors, welds, and supporting structure can resist them. Panache Engineering produces PE/SE stamped packages using ASCE 7-22 Chapter 13 seismic demand and ACI 318-19 Chapter 17 concrete anchor capacity checks.
- Deliverable: stamped calculation package plus Certificate of Compliance
- Codes: ASCE 7-22/7-16/7-10, ACI 318-19 Ch. 17, AISC 360-22, IBC/CBC
- Covers equipment, piping, duct, cable tray, and vibration-isolated units
- Typical turnaround 1-3 weeks; expedited plan-check responses available
Source: PANACHE ENGINEERING INC, Arcadia, CA · (626) 698-0784 · support@panacheg.com
24 hours — Quote returned
Submit equipment data sheet → fixed-fee quote.
5–7 days — Stamped package
Standard scope: single equipment + anchor pattern.
48 hours — Plan-check response
We respond to AHJ comments inside 2 business days.
What's in every stamped seismic anchor calculation
Whether your project documents call it a seismic anchor calculation, an anchor seismic calculation, or a seismic anchorage calculation, you receive the same PE/SE stamped deliverable — code-current, plan-check ready, and built to clear HCAI, DSA, and IBC review on first submission.
- Fp / Fv determination per ASCE 7-22 §13.3
- Per-anchor tension & shear from free-body analysis
- Ω0p amplification for concrete-controlled limit states
- ACI 318-19 Ch.17 — steel, breakout, pullout, blowout, pryout
- §17.8 tension–shear interaction with DCR table
- Cracked / uncracked concrete assumptions documented
- Edge distance & spacing modifications (ψed, ψc)
- PE/SE wet stamp on every sheet
Code references on every page
Every seismic anchor calculation we deliver cites the governing code section for each check — no black-box outputs, no proprietary spreadsheets without traceability.
| Code Section | What it governs |
|---|---|
| ASCE 7-22 §13.3.1 | Fp horizontal seismic force on nonstructural components |
| ASCE 7-22 §13.3.2 | Fv vertical seismic force component |
| ASCE 7-22 §13.4.2 | Ω0p overstrength amplification for anchors in concrete/masonry |
| ACI 318-19 §17.5 | Steel strength of anchor in tension & shear |
| ACI 318-19 §17.6 | Concrete breakout strength (Ncb / Vcb) |
| ACI 318-19 §17.7 | Pullout, side-face blowout, pryout strengths |
| ACI 318-19 §17.8 | Combined tension & shear interaction |
| ACI 318-19 §17.10.6 | Seismic 0.75 reduction on concrete-governed strength |
Deep dives
Engineer-to-engineer reference content covering the codes, methods, and decisions behind every seismic anchor calculation we stamp.
How to calculate seismic anchor forces — seismic force calculation workflow
Inputs to document, engineer-of-record decisions, and review steps under ASCE 7-22.
Cast-in vs post-installed for seismic anchor calculations
Ω0 application, cracked-concrete defaults, and edge-distance penalties.
ACI 318-19 Ch.17 + ASCE 7-22 §13.4 — the code pair
The two standards behind every seismic anchor calculation.
Ready for a stamped seismic anchor calculation?
Send your equipment data sheet — receive a fixed-fee quote within 24 hours.
Frequently asked questions
- What are seismic anchor calculations?
- Seismic anchor calculations are PE/SE stamped engineering checks that verify a nonstructural component's anchorage to the building structure under design seismic forces. Per ASCE 7-22 Chapter 13, the calculation derives Fp, resolves it into per-anchor tension and shear, applies Ω0 amplification, and verifies every ACI 318-19 Chapter 17 limit state.
- How fast can you turn around stamped seismic anchor calculations?
- Standard scopes — single-piece equipment with documented weight and CG — are returned PE/SE stamped within 5–7 business days. Urgent same-week submittals are available with priority queue.
- Are your calculations accepted by HCAI/OSHPD?
- Yes. Every package is built to clear HCAI (formerly OSHPD), DSA, and IBC plan-check on first review. We have submitted hundreds of calculations to California hospital projects since 2008.
What goes into a stamped anchor calculation
Code walkthroughs and worked examples behind every calculation package we seal.
What's Inside a Stamped Seismic Anchor Calculation Package
Plan-check rejects packages for missing pages far more often than for wrong math. Here is exactly what a stamped seismic anchor calculation package contains, page by page.
Read articleACI 318-19 Ch. 17 vs ASCE 7-22 §13.4 — Anchor Calc Cheat Sheet
Engineer's cross-reference for ASCE 7-22 §13.4 and ACI 318-19 Chapter 17 — the two codes behind every stamped seismic anchor calculation. Includes a 1-page cheat sheet of every governing section.
Read articleCenter of Gravity and Overturning in Equipment Anchorage: The Calculation Plan Reviewers Always Check
How to compute anchor tension and shear from F_p and F_v on tall or eccentric equipment using the center-of-gravity moment arm — with worked examples and the plan-check checklist.
Read articleF_p,min and F_p,max in ASCE 7-22: When the Bounds Govern (and Why They Catch Engineers)
When the F_p,min lower bound and F_p,max upper bound from ASCE 7-22 §13.3 control the design — and how to identify the governing case on any submittal.
Read articleH_f and R_μ in ASCE 7-22 §13.3: Height Amplification and Building Ductility for Nonstructural Components
How the H_f (height amplification) and R_μ (structure ductility reduction) factors in ASCE 7-22 Eq. 13.3-1 replace the old (1+2z/h) — with Tables 13.3-1 walked through and a worked rooftop example.
Read articleACI 318-19 Chapter 17: Anchor Limit States Explained
A practical walk-through of every ACI 318-19 Chapter 17 anchor limit state — steel strength, concrete breakout, pullout, side-face blowout, pryout, and the §17.8 interaction — for seismic anchorage of nonstructural components.
Read articleRelated guides in this topic hub
Continue through the connected code, certification, and design references.