GIRDER-SLAB SYSTEM / DESIGN GUIDE v3.2. v3.2. GIRDER-SLAB DESIGN GUIDE v3.2

GIRDER-SLAB SYSTEM / DESIGN GUIDE v3.2 07 v3.2 GIRDER-SLAB DESIGN GUIDE v3.2

Mid to high-rise residential structures have traditionally used a cast-in-place reinforced concrete structural system which offers such benefits as low floor to floor height and fireproof construction. With similar benefits, low to mid-rise buildings often utilize bearing wall systems supporting precast slabs. These structural systems are time consuming, weather sensitive and labor intensive. An innovative design with a conventional approach. Girder-Slab Technologies, LLC set out to develop a more efficient structural steel based framing system for mid and high-rise residential construction. Utilizing proven materials that have long been used by the construction industry, the Girder-Slab System is designed by the owner s architect and structural engineer and is available competitively from the builder s customary steel fabricators. The components of the system, structural steel (including the D-Beam Girder) and precast hollow-core slabs, can be manufactured and supplied by many subcontractors guaranteeing the owner competitive procurement of the building s superstructure. GIRDER-SLAB DESIGN GUIDE V3.2 2

GIRDER-SLAB DESIGN GUIDE v3.2

The D-Beam Girder With practically an unlimited source of supply, the D-Beam Girder is manufactured by your local steel fabricators as part of a complete structural steel package. The D-Beam fabrication process begins with a standard wide flange section that when uniquely cut through the web produces two identical T sections. The fabricator then welds a flat bar to create the top flange resulting in two D-Beams from one parent beam without waste. GIRDER-SLAB DESIGN GUIDE V3.2 4

The Girder-Slab System and the open web D-Beam technology are the result of more than fifteen years of research and development. Early testing produced an ASD approach for a rational design of the Girder-Slab System. In order to develop a rational analysis that would maximize the use of this technology, extensive laboratory testing and analysis was undertaken. This included both small-scale specimens and full-scale assemblies in order to simulate actual bays. Each assembly was load tested well above code required residential live loads. The D-Beam Girder performed without failure even at these higher loads. Recent, more sophisticated testing enabled us to develop an LRFD approach to the Girder-Slab System. Design Guide v3.1 LRFD improved upon the previously established structural and economical benefits of the Girder-Slab System. With simplicity in mind, new D-Beams have been introduced while others, less commonly used, have been eliminated. Neutral Axis Slab Grout Steel The Girder-Slab System integrates easily with lateral resisting steel braced frames, and concrete or masonry shear walls. GIRDER-SLAB DESIGN GUIDE V3.2 6

Framing Plan Example DB8 DB8 DB8 W18 BF W18 W21 W18 BF BF ELEV. ELEV. HSS W12 ELEV. W12 HSS DB8 W12 W21 W10 W10 HSS W10 W10 STAIR W12 DB8 W12 DB8 DB8 W12 W18 BF DB8 DB8 DB8 DB8 W10 W10 W10 W10 W10 W10 W18 BF W10 W12 W18 BF BF W18 W21 DB8 W10 W10 W10 DB 8 W10 W10 W10 W10 STAIR W10 W10 W18 DB8 W10 DB8 W10 W10 W10 DB8 indicates 8 D-Beam Girder Section indicates 8 Precast Hollow-Core Slab GIRDER-SLAB DESIGN GUIDE V3.2 8

D-Beam Dimensions Designation Web Included Weight Average Area Depth (d) Parent Beam Size Web Thickness (t w ) Flange Thickness (t f ) Flange Width (b f ) a b w t (lb/ft) (in 2 ) (in) (in) (in) (in) (in) (in) (in) (in) DB 8 x 37 36.7 10.8 8 W 12 x 53 3/8 9/16 10 2 5 3 1 DB 8 x 39 39.2 11.5 8 W 12 x 58 3/8 5/8 10 1 3/4 5 1/4 3 1 DB 8 x 42 41.8 12.3 8 W 12 x 53 3/8 9/16 10 1 5 1/2 3 1 1/2 DB 8 x 45 44.3 13.0 8 W 12 x 58 3/8 5/8 10 3/4 5 3/4 3 1 1/2 DB 8 x 57 56.5 16.6 8 W 12 x 79 1/2 3/4 12 1/8 1 5/8 5 3/8 5 1 DB 8 x 61 60.8 17.9 8 W 12 x 79 1/2 3/4 12 1/8 1 1/8 5 5/8 5 1 1/4 DB 9 x 41 40.7 12.0 9 5/8 W 14 x 61 3/8 5/8 10 3 3/8 5 1/4 3 1 DB 9 x 45 44.2 13.0 9 3/4 W 14 x 68 7/16 3/4 10 3 1/2 5 1/4 3 1 DB 9 x 46 45.8 13.5 9 5/8 W 14 x 61 3/8 5/8 10 2 3/8 5 3/4 3 1 1/2 DB 9 x 48 47.2 13.9 9 13/16 W 14 x 74 7/16 13/16 10 1/8 3 1/2 5 5/16 3 1 DB 9 x 49 49.3 14.5 9 3/4 W 14 x 68 7/16 3/4 10 2 1/2 5 3/4 3 1 1/2 DB 9 x 52 52.3 15.4 9 13/16 W 14 x 74 7/16 13/16 10 1/8 2 1/2 5 13/16 3 1 1/2 DB 9 x 57 56.5 16.6 9 3/4 W 12 x 79 1/2 3/4 12 1/8 5 1/8 3 5/8 5 1 DB 9 x 65 65.0 19.1 9 3/4 W 12 x 79 1/2 3/4 12 1/8 4 1/8 4 1/8 5 1 1/2 GIRDER-SLAB DESIGN GUIDE v3.2

D-Beam Properties F y = 50 ksi Designation I x NA bot DB S bot S top Q top bar PNA bot DB Z ASD 9 TH Edition M allow ASD 14 TH Edition M n /Ω b LRFD 14 TH Edition φ b M n (in 4 ) (in) (in 3 ) (in 3 ) (in 3 ) (in) (in 3 ) (kip-ft) (kip-ft) (kip-ft) DB 8 x 37 105 2.79 37.7 20.2 14.1 0.51 26.1 50.4 65.0 97.7 DB 8 x 39 108 2.69 40.3 20.4 14.4 0.55 26.5 51.0 66.2 99.5 DB 8 x 42 126 3.32 38.0 27.0 17.7 1.53 35.9 67.6 89.6 134.6 DB 8 x 45 131 3.21 40.8 27.4 18.2 0.85 36.7 68.5 91.5 137.5 DB 8 x 57 169 2.93 57.7 33.3 22.9 0.68 42.4 83.2 105.9 159.2 DB 8 x 61 188 3.22 58.2 39.2 26.0 0.73 50.8 98.1 126.6 190.3 DB 9 x 41 161 3.13 51.4 24.8 18.0 0.55 31.4 62.0 78.4 117.8 DB 9 x 45 173 2.92 59.1 25.3 19.0 0.62 32.6 63.3 81.3 122.2 DB 9 x 46 198 3.79 52.2 33.9 22.9 0.85 44.0 84.8 109.7 164.9 DB 9 x 48 179 2.83 63.1 25.6 19.5 0.65 33.0 63.9 82.4 123.8 DB 9 x 49 215 3.55 60.6 34.7 24.5 0.71 45.4 86.8 113.2 170.2 DB 9 x 52 224 3.44 65.0 35.2 25.3 0.74 45.9 87.9 114.5 172.0 DB 9 x 57 258 3.40 76.0 40.7 29.3 0.64 47.8 101.7 119.3 179.4 DB 9 x 65 314 4.10 76.6 55.7 36.7 0.84 68.1 139.2 170.0 255.5 GIRDER-SLAB DESIGN GUIDE V3.2 10

Sample Calculations LRFD 8 D-Beam DB 8 x 61 with 8 Hollow-Core Note: Graphical representation only. The online D-Beam Calculator Reference Tool v3.1 is intended for use only with assemblies identical to S1 and S3 in Girder-Slab Design Guide v3.2. GIRDER-SLAB DESIGN GUIDE v3.2

LRFD 9 D-Beam DB 9 x 65 with 10 Hollow-Core Note: Graphical representation only. The online D-Beam Calculator Reference Tool v3.1 is intended for use only with assemblies identical to S1 and S3 in Girder-Slab Design Guide v3.2. GIRDER-SLAB DESIGN GUIDE V3.2 12

GIRDER-SLAB DESIGN GUIDE V3.2 14

D-BEAM DB8 PRECAST CONCRETE SLAB D-BEAM DB8 PRECAST CONCRETE SLAB 8 GROUT 8 GROUT (1) LAYER GYPSUM BOARD (REFER TO U.L. K912) OPTIONAL GYPSUM BOARD & METAL STUD PARTITION OPTIONAL CROWN MOLDING SPRAY FIREPROOFING (REFER TO U.L. K912) OPTIONAL GYPSUM BOARD & METAL STUD PARTITION D-BEAM DB8 PRECAST CONCRETE SLAB D-BEAM DB8 PRECAST CONCRETE SLAB 8 GROUT 8 GROUT PIPING & MECHANICAL CHASE 11 1/4 MIN. STRUCTURAL, PIPING, & MECHANICAL CHASE 11 1/4 MIN. GIRDER-SLAB DESIGN GUIDE V3.2 18

SPECIFYING THE GIRDER-SLAB SYSTEM TECHNOLOGY v3.2 The Girder-Slab System Design Guide v3.2 and technology is available for use by industry professionals. Application and use of this information requires design by a registered professional structural engineer. Structural Engineers are asked to add the following Girder-Slab System Specification Guide to the General Notes section of their construction documents. The Specification Guide and the Typical System Structural and Architectural Details are available in both CAD and PDF formats on the Design Team Resources page of the Girder-Slab website. www.girder-slab.com The Girder-Slab System and D-Beam Girder are available from your customary steel fabricators. Fabrication, construction, and assembly shall be in conformance with the Girder-Slab System Design Guide v3.2 specifications and details. GIRDER-SLAB DESIGN GUIDE v3.2

Fire Resistance Information Fire Resistance Rating ANSI/UL 263 Design No. K912 April 19, 2001 Restrained Assembly Ratings 3 Hr. Unrestrained Assembly Ratings 2 Hr. Unrestrained Beam Ratings 2 Hr. ALSO AVAILABLE IN CANADA Summarized from UL #K912. Please refer to the current online Certifications Directory for modifications or updates. GIRDER-SLAB DESIGN GUIDE V3.2 20

The application and use of the Girder-Slab System technology requires design by your registered professional engineer or architect. This Design Guide provides engineering information and is available for use by industry professionals. Girder-Slab Technologies, LLC is a marketing company. We inform design and construction professionals, supply design tools and details, and assist the engineer of record on an as needed basis. Girder-Slab Technologies can help you determine whether or not the Girder-Slab System will add value to your project. GIRDER-SLAB DESIGN GUIDE v3.2

GIRDER-SLAB DESIGN GUIDE V3.2

09 Gypsum Wall Board Ceiling 10 Eliminate Beam Penetrations 11 UL K912 12 Various Architectural Designs GIRDER-SLAB DESIGN GUIDE V3.2

GIRDER-SLAB DESIGN GUIDE V3.2

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