Aci-350.3-06.pdf Jun 2026

As of October 2021, the current version is (also referred to as ACI 350.3-20). This document supersedes ACI 350.3-06 and became effective November 20, 2020. The newer version incorporates updates to seismic force levels, R-factors, and references to updated ground motion maps.

In practical engineering workflows, ACI 350.3-06 serves as a primary calculation tool. Structural engineers use the standard to compute the seismic loads on individual tank walls, considering factors like wall location and orientation. A typical approach might involve the following: ACI-350.3-06.pdf

ACI 350.3-06 provides specialized, code-mandated procedures for the seismic design of concrete liquid-containing structures, analyzing hydrodynamic forces by separating liquid mass into impulsive and convective components. The standard, which includes crucial commentary for structural engineers, applies to both circular and rectangular tanks to ensure integrity during seismic events. Download the full technical document for reference at bts-co.net . As of October 2021, the current version is

: Provisions for the structural design of concrete tanks and similar structures, including considerations for strength, serviceability, and durability. In practical engineering workflows, ACI 350

ACI-350.3-06.pdf provides explicit formulas to calculate the mass participation factors for both components based on tank geometry (height-to-radius ratio). It also provides design charts (Figures R4.1a through R4.1d) that are frequently copied into engineering spreadsheets.

Always consult a licensed structural engineer for specific seismic design. This article is for informational purposes regarding the standard itself and does not constitute professional engineering advice.

An errata document was issued for the 3rd and 4th printings of ACI 350.3-06. The errata document is 2 pages long and contains several critical revisions.