GST Design Guide v3.1 LRFD ISSUU.pdf
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Transcript of GST Design Guide v3.1 LRFD ISSUU.pdf
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Mid to high-rise residential structures have traditionally used a cast-in-place reinforced concrete structural system which offers such bene ts as low oor to oor height and reproof construction. With similar bene ts, low to mid-rise buildings often utilize bearing wall systems supporting precast slabs. These structural systems are time consuming, weather sensitive and labor intensive.
Girder-Slab Technologies, LLC set out to develop a more ef cient 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 owners architect and structural engineer and is available competitively from the builders 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 buildings superstructure.
An innovative design with a conventional approach.
GIRDER-SLABDESIGN GUIDE V3.1 2
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The D-Beam GirderWith 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 ange section that when uniquely cut through the web produces two equal but opposite T sections.
The fabricator then welds a at bar to create the top ange resulting in two D-Beams from one parent beam without waste.
GIRDER-SLABDESIGN GUIDE V3.1 4
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Neutral Axis
SlabGroutSteel
GIRDER-SLABDESIGN GUIDE V3.1 6
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8 D-BEAMDESIGNATION
WEB INCLUDED DEPTH WEB PARENT BEAMTOP BARw x t WEIGHT AVERAGEAREA d
THICKNESStw SIZE
a b
lb/ft in2 in in in in in x in
DB 8 x 37 36.7 10.8 8 3/8 W 12 x 53 2 5 3 x 1
DB 8 x 39 39.2 11.5 8 3/8 W 12 x 58 13/4 51/4 3 x 1
DB 8 x 42 41.8 12.3 8 3/8 W 12 x 53 1 51/2 3 x 11/2
DB 8 x 45 44.3 13.0 8 3/8 W 12 x 58 3/4 53/4 3 x 11/2
DB 8 x 57 56.5 16.6 8 1/2 W 12 x 79 15/8 53/8 5 x 1
DB 8 x 61 60.8 17.9 8 1/2 W 12 x 79 11/8 55/8 5 x 11/4
9 D-BEAMDESIGNATION
WEB INCLUDED DEPTH WEB PARENT BEAMTOP BARw x t WEIGHT AVERAGEAREA d
THICKNESStw SIZE
a b
lb/ft in2 in in in in in x in
DB 9 x 41 40.7 12.0 95/8 3/8 W 14 x 61 33/8 51/4 3 x 1
DB 9 x 45 44.2 13.0 93/4 7/16 W 14 x 68 31/2 51/4 3 x 1
DB 9 x 46 45.8 13.5 95/8 3/8 W 14 x 61 23/8 53/4 3 x 11/2
DB 9 x 48 47.2 13.9 913/16 7/16 W 14 x 74 31/2 55/16 3 x 1
DB 9 x 49 49.3 14.5 93/4 7/16 W 14 x 68 21/2 53/4 3 x 11/2
DB 9 x 52 52.3 15.4 913/16 7/16 W 14 x 74 21/2 513/16 3 x 11/2
DB 9 x 57 56.5 16.6 93/4 1/2 W 12 x 79 51/8 35/8 5 x 1
DB 9 x 65 65.0 19.1 93/4 1/2 W 12 x 79 41/8 41/8 5 x 11/2
GIRDER-SLABDESIGN GUIDE V3.1 8
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Sample Calculations8 D-Beam DB 8 x 61 with 8 Hollow-CoreLRFD
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9 D-Beam DB 9 x 65 with 10 Hollow-CoreLRFD
GIRDER-SLABDESIGN GUIDE V3.1 10
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GIRDER-SLABDESIGN GUIDE V3.1 12
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GIRDER-SLABDESIGN GUIDE V3.1 14
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DB8D-BEAM
PRECAST CONCRETESLAB
GROUT
METAL STUD PARTITIONGYPSUM BOARD &OPTIONAL
8
(1) LAYER GYPSUM BOARD (REFER TO U.L. K912)
METAL STUD PARTITIONGYPSUM BOARD &OPTIONAL
OPTIONALCROWNMOLDING
8 GROUT
SPRAYFIREPROOFING(REFER TO U.L. K912)
PRECAST CONCRETESLAB
DB8D-BEAM
DB8D-BEAM
PRECAST CONCRETESLAB
GROUT8
PIPING &MECHANICALCHASE
11 1/4
MIN.
PRECAST CONCRETESLAB
DB8D-BEAM
GROUT8
STRUCTURAL,PIPING, &MECHANICALCHASE
11 1/4MIN.
GIRDER-SLABDESIGN GUIDE V3.1 16
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Fire Resistance InformationFire Resistance Rating ANSI/UL 263Design No. K912April 19, 2001Restrained 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
Certi cations Directory for modi cations or updates.
GIRDER-SLABDESIGN GUIDE V3.1 18
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GIRDER-SLABDESIGN GUIDE V3.1 20
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09 Gypsum Wall Board Ceiling 10 Eliminate Beam Penetrations
11 UL K912 12 Various Architectural Designs
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GIRDER SLAB COMPOSITE STEEL AND PRECAST SYSTEM
COMPOSITE STEEL AND PRECAST SYSTEM
GIRDER SLAB
REVERSE
POSITIVE
FONTS: ITC LUBALIN GRAPH DEMI & HELVETICA BOLD
COLORS: PMS 146 & BLACK