The American Concrete Institute (ACI) standard titled Building Code Requirements for Structural Concrete (ACI 318) includes provisions for reinforced concrete design. These provisions are written for cast-in reinforcing bar design; however, post-installed reinforcing bars that demonstrate equivalency to cast-in bars can also be designed for development with these provisions. This paper will discuss how the development provisions given in ACI 318-19 Chapter 25 (non-seismic) and ACI 318-19 Chapter 18 (seismic) can be used to design post-installed reinforcing bars for tension development.

Summary

Adhesive anchor systems successfully evaluated per the test program outlined in Table 3.8 of the ICC-ES acceptance criteria AC308 demonstrate compliance "in the opinion of ICC-ES" with the IBC and performance equivalent to cast-in reinforcing bars. Done so that the post-installed bars can be designed for development using ACI 318 development provisions. The ICC-ES evaluation report (ESR) for Hilti adhesive systems will note if the adhesive product has been evaluated per AC308 Table 3.8. Reference Section 6.0 in the ESR. Section 4.2 in the ESR will state that the adhesive can be used to post-install reinforcing bars per the development provisions of ACI 318. The attached examples show how post-installed reinforcing bars can be designed with a Hilti adhesive product per the tension development provisions in ACI 318-19.

Additional Resources
 
Design Guides
Hilti Post-installed Reinforcing Bar Design Guide
Hilti Post-installed Reinforcing in Fire Conditions Design Guide

Design Software
PROFIS Engineering
           
Hilti Post-Installed Rebar White Papers
* Post-installed Reinforcing Bar Design Options: An Overview
* Shear Friction Design using the Hilti Method for Post-installed Rebar Design
* Design for Yield using Anchoring-to-Concrete Provisions for Post-installed Reinforcing Bar Design
* Extension Design using ACI 318-19 Provisions for Post-installed Reinforcing Bar
* Structural Joint Design using ACI 318-19 Provisions for Post-installed Reinforcing Bar
* Shear Friction using ACI 318-19 Anchoring-to-Concrete Provisions for Post-installed Reinforcing Bar Design
* Shear Friction using ACI 318-19 Provisions for Post-installed Reinforcing Bar Design
* Designing Rebar in Fire-rated Concrete-to-concrete Connections: Frequently Asked Questions
* Designing Post-installed Rebar for Fire Conditions using PROFIS Engineering Whitepaper