ICC-ES Evaluation Report ESR-2818
Report Holder: DEWALT
Evaluation Subject: POWER-STUD®+ SD1 EXPANSION ANCHORS IN CRACKED AND UNCRACKED CONCRETE (DEWALT)
Revision Dates: Reissued December 2024, Revised July 2025
Subject to Renewal: December 2025
Copyright © 2025 ICC Evaluation Service, LLC. All rights reserved.
1.0 EVALUATION SCOPE
This report evaluates the Power-Stud+ SD1 expansion anchors for compliance with the following codes:
- 2024, 2021, 2018, and 2015 International Building Code® (IBC)
- 2024, 2021, 2018, and 2015 International Residential Code® (IRC)
The main references for this report are the 2024 IBC and IRC. The property evaluated is Structural.
2.0 USES
The Power-Stud+ SD1 expansion anchors are designed for anchorage in normal-weight and lightweight concrete with a specified compressive strength (f'c) ranging from 2,500 psi to 8,500 psi (17.2 MPa to 58.6 MPa). They are intended to resist static, wind, and seismic tension and shear loads.
Specific Application Conditions:
- 1/4-inch (6.4 mm) anchors: Must be installed in uncracked normal-weight or lightweight concrete.
- 3/8-inch through 11/4-inch anchors (9.5 mm to 31.8 mm): May be installed in cracked or uncracked normal-weight or lightweight concrete.
- 3/8-inch and 1/2-inch anchors (9.5 mm and 12.7 mm): Can be installed in the topside of cracked and uncracked concrete-filled steel deck (normal-weight or sand-lightweight) with f'c of 2,500 psi to 8,500 psi.
- 1/4-inch to 3/4-inch anchors (6.4 mm to 19.1 mm): Can be installed in the soffit of cracked and uncracked concrete-filled steel deck (normal-weight or sand-lightweight) with a minimum f'c of 3,000 psi (20.7 MPa).
The anchors comply with IBC Section 1901.3 and may be used with an engineered design per IRC Section R301.1.3.
3.0 DESCRIPTION
3.1 Power-Stud+ SD1 Anchors
The Power-Stud+ SD1 are torque-controlled, mechanical expansion anchors. Each anchor consists of an anchor body, an expansion wedge (clip), a washer, and a hex nut. Product names include DEWALT Power-Stud+ SD1 and Hillman Power-Stud+ SD1 / Power Pro SD1 Wedge Anchor.
Available anchor diameters range from 1/4-inch (6.4 mm) to 11/4-inch (31.8 mm). The anchor body and expansion clip are made from medium carbon steel with a minimum 0.0002-inch (5 µm) zinc plating (ASTM B633 SC1 Type III). Washers comply with ASTM F844, and hex nuts with ASTM A563 Grade A.
The anchor functions by drawing a tapered mandrel into an expansion clip when the nut is tightened. This action forces the clip outward into the predrilled hole in the base material.
3.2 Concrete Requirements
Concrete must comply with IBC 2024 Sections 1903 and 1905.
3.3 Steel Deck Panels
Steel deck panels must meet configurations shown in Figures 4A, 5A, and 5B, with a minimum base steel thickness of 0.035 inch (No. 20 gauge). Steel must comply with ASTM A653/A653M SS Grade 33 or Grade 50.
4.0 DESIGN AND INSTALLATION
4.1 Strength Design
Design strength calculations must follow IBC 2024, IRC R301.1.3, and ACI 318-19 Chapter 17. Strength reduction factors () are provided per ACI 318-19 Section 17.5.3 and noted in the tables.
Key Design Considerations:
- Steel Strength in Tension (Nsa): Per ACI 318-19 Section 17.6.1.2, values are in Table 2A.
- Concrete Breakout Strength in Tension (Ncb/Ncbg): Per ACI 318-19 Section 17.6.2.
- Pullout Strength in Tension (Npn): Per ACI 318-19 Sections 17.6.3.1, 17.6.3.2.1, with formulas provided.
- Steel Strength in Shear (Vsa): Per ACI 318-19 Section 17.7.1.2, values are in Table 2B.
- Concrete Breakout Strength in Shear (Vcb/Vcbg): Per ACI 318-19 Section 17.7.2.
- Pryout Strength in Shear (Vcp/Vcpg): Per ACI 318-19 Section 17.7.3.
- Seismic Design: 1/4-inch anchors are for Seismic Categories A & B; larger anchors (3/8"-11/4") are for Seismic Categories A-F. Design must follow ACI 318-19 Section 17.10.
- Interaction of Tensile and Shear Forces: Design must comply with ACI 318-19 Section 17.8.
- Critical Edge Distance: Calculations may require multiplication by a factor cp,N per ACI 318-19 Section 17.6.2.
- Minimum Member Thickness, Spacing, Edge Distance: Must comply with Table 1 and Figures 4A, 4B, 5A, 5B.
- Lightweight Concrete: A modification factor of 0.8 is applied to f'c for Nn and Vn calculations.
4.2 Allowable Stress Design (ASD)
Design values for ASD are calculated using specific formulas (Eq-4, Eq-5) and must consider interaction of tensile and shear forces (Eq-6).
4.3 Installation
Installation must adhere to manufacturer's printed instructions (Figure 3) and this report. Key steps include:
- Drilling holes with appropriate drill bits (ANSI B212.15-1994) to the specified depth.
- Thoroughly cleaning the drilled hole to remove dust and debris using methods like dust extractors or forced air.
- Hammering the anchor into the predrilled hole until the minimum embedment depth (hnom) is achieved.
- Tightening the nut against the washer to the torque values specified in Table 1.
Specific installation details for concrete-filled steel deck assemblies are provided in Figures 4A, 4B, 5A, and 5B.
4.4 Special Inspection
Periodic special inspections are required during anchor installation to verify compliance with installation procedures and specifications, as per IBC Section 1705.1.1.
5.0 CONDITIONS OF USE
The Power-Stud+ SD1 expansion anchors comply with the specified codes when used under the following conditions:
- Installation must follow manufacturer's instructions and this report.
- Anchor sizes, dimensions, and minimum embedment depths must be as specified.
- Concrete strength requirements (f'c) must be met for specific anchor sizes and installation locations (e.g., cracked/uncracked concrete, steel deck).
- Calculated f'c values must not exceed 8,000 psi (55.2 MPa).
- Strength and allowable stress design values must be established per Sections 4.1 and 4.2.
- Anchor spacing, edge distance, and member thickness must comply with Table 1 and associated figures.
- Calculations and details must be submitted to the code official, prepared by a registered design professional where required.
- Use for fatigue or shock loading is outside the scope of this report.
- Anchors (except 1/4-inch) are permitted in cracked concrete under specified conditions.
- Wind and seismic load resistance is defined for different seismic design categories.
- Fire-resistance-rated construction use is permitted under specific conditions.
- Carbon steel anchors are limited to dry, interior locations.
- Special inspection is mandatory.
- Anchors are manufactured under an approved quality-control program.
6.0 EVIDENCE SUBMITTED
Data submitted includes compliance with ICC-ES Acceptance Criteria AC193, ACI 355.2, service-condition tests, and quality control documentation.
7.0 IDENTIFICATION
Products must be marked with the ICC-ES mark, evaluation report number (ESR-2818), and the report holder's name/logo. Anchors are identified by dimensional characteristics and packaging, with a length letter code stamped on the threaded stud end. Packages are labeled with product name, type, size, and company name.
Report Holder Contact:
DEWALT
701 EAST JOPPA ROAD
TOWSON, MARYLAND 21286
(800) 524-3244
www.DEWALT.com
anchors@DEWALT.com
Additional Listee Contact:
THE HILLMAN GROUP
1280 KEMPER MEADOW DRIVE
CINCINNATI, OHIO 45240
info@hillmangroup.com
Tables
The report includes several tables providing detailed design and installation data:
- Table A: Installation and Design Index.
- Table 1: Power-Stud+ SD1 Anchor Installation Specifications, detailing dimensions, torque, and clearances for various anchor sizes.
- Table 2A: Tension Design Information for Power-Stud+ SD1 Anchors in Concrete, including steel and concrete strength values.
- Table 2B: Shear Design Information for Power-Stud+ SD1 Anchors in Concrete, including steel and concrete shear strength values.
- Table 3: Tension and Shear Design Information for Power-Stud+ SD1 Anchors in the Soffit of Concrete-Filled Steel Deck Assemblies.
- Table 4: Example Allowable Stress Design Values for Illustrative Purposes.
- Table 5: Applicable Sections of the IBC under different editions.
- Table 6: Applicable Sections of ACI 318 under different editions.
Figures
The report references several figures illustrating anchor details, assembly, installation procedures, and specific application scenarios:
- Figure 1: Power-Stud+ SD1 Anchor Detail (Before and After Installation Torque).
- Figure 2: Power-Stud+ SD1 Anchor Assembly diagram.
- Figure 3: Power-Stud+ SD1 Installation Instructions, detailing the four-step process.
- Figure A: Examples of DEWALT Dust Removal Drilling Systems with HEPA Dust Extractors.
- Figures 4A & 4B: Installation details for anchors in the topside of concrete-filled steel deck assemblies.
- Figures 5A & 5B: Installation details for anchors in the soffit of concrete over steel deck assemblies.
- Figure 6: Example Strength Design Calculation including ASD conversion.
- Figure 7: Illustration for Interpolation of Minimum Edge Distance and Minimum Anchor Spacing.
