ICC-ES Evaluation Reports are not to be construed as representing aesthetics or any other attributes not specifically addressed, nor are they to be construed as an endorsement of the subject of the report or a recommendation for its use. There is no warranty by ICC Evaluation Service, Inc., express or implied, as to any finding or other matter in this report, or as to any product covered by the report.

Copyright © 2009 Page 1 of 2

ICC-ES Evaluation Report ESR-2534 Issued November 1, 2009 This report is subject to re-examination in one year.

www.icc-es.org | (800) 423-6587 | (562) 699-0543 A Subsidiary of the International Code Council ®

DIVISION: 03—CONCRETE Section: 03153—Concrete Shear Stud Anchors and

Connectors REPORT HOLDER: DYWIDAG–SYSTEMS INTERNATIONAL USA, INC. 2400 NORTH HIGHWAY 287, SUITE 106 MANSFIELD, TEXAS 76063 (817) 473-6161 www.dsiamerica.com EVALUATION SUBJECT: DYWIDAG SHEAR SYSTEM (DSS) 1.0 EVALUATION SCOPE

Compliance with the following code: 2006 International Building Code® (IBC)

Property evaluated: Structural

2.0 USES The DYWIDAG Shear System (DSS) headed shear stud reinforcement assemblies are used as punching shear reinforcement at column locations in flat concrete slabs.

3.0 DESCRIPTION 3.1 General: The DSS is a stud rail assembly, which is comprised of headed steel studs factory-welded to a steel plate. The assemblies comply with the requirements of ASTM A 1044. The available stud sizes and corresponding head dimensions are shown in Table 1. The dimensions of the plates for each stud size are shown in Table 2. The studs are spaced along the plates in accordance with the project-specific design. 3.2 Materials: 3.2.1 Headed Shear Studs: The single-headed shear studs are cold formed from steel bars conforming to ASTM A 108 Grades 1010 through 1020, having the following specified properties:

1. Yield strength: 51,000 psi (350 MPa), minimum.

2. Tensile strength: 65,000 psi (450 MPa), minimum.

3. Elongation: 20 percent in 2 inches (51 mm), minimum.

4. Reduction of area: 50 percent, minimum.

3.2.2 Plates: The plates are cut from steel plates conforming to ASTM A 36, having the following specified properties:

1. Yield strength: 44,000 psi (300 MPa), minimum.

2. Tensile strength: 65,000 psi (450 MPa), minimum.

3. Elongation: 20 percent in 8 inches (203 mm), minimum.

4.0 DESIGN AND INSTALLATION 4.1 Design: 4.1.1 General: Structural design and installation of the DSS assemblies in concrete slabs must comply with the applicable provisions of ACI 318-05 and Sections 3.5.5, 7.7.5 and 11.11.5 of ACI 318-08. The following information must be determined on a case-by-case basis: number of studs per DSS assembly; stud diameter; stud spacing; DSS assembly height and length; and distance between column face and first line of studs. 4.1.2 Earthquake Loads: In Seismic Design Categories C, D, E, and F, the DSS assemblies may be used at slab-to-column connections under the following conditions:

1. Lateral force–resisting elements of the structure must be designed using the IBC.

2. The nominal shear strength provided by concrete in the presence of shear studs, determined in accordance with Section 4.1.1, must be limited as follows:

dbfλV occ ′= 1.5

This limitation is in lieu of the concrete shear strength limitation given in Section 11.11.5.1 of ACI 318-08, and will affect the nominal shear strength, Vn, and the maximum shear stress, vn.

3. Design of two-way slabs without beams, designated as part of the seismic force–resisting system must comply with the provisions in Section 21.3.6.8 of ACI 318-08, except that Vc must be limited as noted in Item 2, above.

4. Design of two-way slabs without beams, which are not designated as part of the seismic force–resisting system, must comply with the provisions in Section 21.13.6 of ACI 318-08, except that Vc must be limited as noted in Item 2, above, and the design story drift ratio specified in Section 21.13.6(b) of ACI 318-08 must not exceed the design story drift ratio given in Table 12.12-1 of ASCE/SEI 7.

ESR-2534 | Most Widely Accepted and Trusted Page 2 of 2

4.2 Installation: The DSS assemblies must be installed in accordance with the approved plans and the IBC. The approved plans must be available on the jobsite at all times during installation.

Surface conditions of the DSS assemblies must comply with Section 1907.4 of the IBC. The DSS assemblies must be installed in the positions specified in the approved plans. Placement must comply with Section 1907.5 of the IBC. Concrete cover must comply with IBC Section 1907.7 and Section 7.7.5 of ACI 318-08. See Figures 2 and 3 for typical installation details.

4.3 Special Inspection: Special inspection of the stud rail reinforcement installation must comply with IBC Section 1704.4. The special inspector is responsible for verifying identification of the DSS assembly per Section 7.0, condition of the assembly, placement, positioning, clearances and concrete cover.

5.0 CONDITIONS OF USE The DYWIDAG Shear System (DSS) headed shear stud reinforcement assemblies described in this report comply with, or are suitable alternatives to what is specified in, the code noted in Section 1.0 of this report, subject to the following conditions:

5.1 The DSS assemblies must be designed, manufactured and installed in accordance with this report and the approved plans. In the event of a conflict between this report and the approved plans, this report governs.

5.2 Drawings and design details showing compliance with the design requirements of Section 4.1 must be submitted to the code official for approval. The drawings and calculations must be prepared by a registered design professional when required by the statutes of the jurisdiction in which the project is to be constructed.

5.3 Special inspections must be performed in accordance with Section 4.3.

5.4 The DSS assemblies are manufactured in Long Beach, California, and Tucker, Georgia, under a quality control program with inspections by Professional Service Industries, Inc. (AA-660).

6.0 EVIDENCE SUBMITTED

Data in accordance with the ICC-ES Acceptance Criteria for Headed Shear Stud Reinforcement Assemblies for Concrete Slabs or Footings (AC395), dated October 2008.

7.0 IDENTIFICATION

Applied to each pallet of DSS assemblies is a weatherproof tag bearing the manufacturer’s name (DYWIDAG–Systems International USA, Inc.) and address, project-specific information, the evaluation report number (ESR-2534) and the name of the inspection agency (Professional Service Industries, Inc.). Each DSS assembly must be color-coded per the approved plans.