Post-installed anchoring systems are very common, cost-effective methods for attaching both structural and non-structural elements to concrete base materials. Non-structural elements, such as fire sprinkler pipes, electrical conduit and cable trays, and heating, ventilating, and air conditioning (HVAC) equipment and ductwork are especially suited for post-installed anchor fastening. Building Integrated Modeling (BIM) has made cast-in anchors more common for non-structural elements hung from the ceiling, but post-installed fixations still dominate because mechanical and electrical locations can move after the concrete is cast. …
Author Archives : Christopher Gamache, P.E.
Christopher Gamache is the Manager of Approvals and Project Engineering/Anchors for Hilti North America. He is responsible for creating the technical data for the Hilti North American Product Technical Guide, Volume 2, for Anchor Fastening and publishing external evaluation reports such as ICC-ES ESR’s. (christopher.gamache@hilti.com)
Reinforcing Bar Development Length using the Provisions of ACI 318
A key aspect of reinforced concrete design is the calculation of the required reinforcing area and the required development and splice lengths for proper reinforcement details. In most structures, the reinforcement is cast with the concrete and subsequent concrete pours, i.e. “new” concrete, is placed around the cast-in-place reinforcement protruding from the existing concrete. …
The Effects of Base Material Temperature during Installation and In-Service Use
Post-installed adhesive anchor systems have been used for many years for the attachment of threaded rods and reinforcing bars to concrete and other masonry base materials. The code that governs the design of adhesive anchor systems is the American Concrete Institute’s ACI 318-14, Building Code Requirements for Structural Concrete, Chapter 17 “Anchoring to Concrete.” The test reference is ACI 355.4, Qualification of Post-Installed Adhesive Anchors in Concrete. …