AAI AAI Load Calculations & Structural Requirements 3

Question 1

When the engineer of record specifies a minimum embedment depth for an adhesive anchor, what must the installer do if the concrete member thickness is insufficient to achieve that depth?

Accepted Answer

Stop work and notify the engineer of record before proceeding

Answer

Install the anchor at the maximum possible depth without notification

Answer

Use a mechanical anchor instead without consulting anyone

Answer

Double the anchor diameter to compensate for reduced depth

Question 2

What is the minimum required edge distance for a 3/4-inch diameter adhesive anchor to prevent concrete splitting during installation, per typical ICC-ES evaluation reports?

Accepted Answer

Typically 1.75 to 2.5 inches, as specified in the product's ICC-ES report

Answer

Always exactly 1 inch regardless of anchor size

Answer

Six times the anchor diameter for all adhesives

Answer

No minimum edge distance is specified for adhesive anchors

Question 3

How does the ACI 318 anchor design account for the possibility of concrete splitting failure?

Accepted Answer

By requiring minimum edge distances, cover, and spacing, or applying a splitting reduction factor

Answer

Splitting failure is ignored because adhesive anchors never cause splitting

Answer

Only the steel rod size controls splitting failure

Answer

A separate splitting check is only required for mechanical expansion anchors

Question 4

What load effect must be included in anchor design when the supported structure can rotate or deflect under load?

Accepted Answer

Prying forces that amplify tension in the anchors nearest the pivot point

Answer

Compressive pre-load that automatically reduces tension demand

Answer

Lateral earth pressure from the rotating structure

Answer

Wind uplift only, not gravity-induced rotation effects

Question 5

For an adhesive anchor subjected to shear load at the concrete surface, which failure mode typically governs at shallow embedment depths?

Accepted Answer

Concrete pryout failure

Answer

Steel rod shear fracture

Answer

Adhesive bond failure in shear

Answer

Concrete side-face blowout

Question 6

Which document provides the basis for the characteristic bond strength (τk) values used in the design of a specific adhesive anchor product?

Accepted Answer

The product's ICC-ES Evaluation Report based on testing per AC308

Answer

ACI 318 Chapter 17 tables that list bond strengths for all adhesives

Answer

The ASTM standard for epoxy materials

Answer

The local building department's standard specification