2.5" 7 4. The section below (at right) shows a floor system consisting of T-beams that connect one-way slabs. Each T-beam has a span length, In, of 40 feet (i.e., in/out of the page). The T-beam cross-section and dimensions are shown in more detail at left. Complete parts a-c below. C. a. Compute by, the flange width, according to AC1318-19 requirements. Table 6.3.2.1 is shown below. Note: Sw represents the clear distance between webs. The neutral axis for this section is in the web. Compute the total area of steel, As, needed to resist bending in the beam. Some Compute the depth of the concrete compression area, a, for this section. b. 16" As? 6"I 22" 8" Wu= 6.15 k/ft (including self weight); Mu= 1230 kft Flange location Each side of web Table 6.3.2.1-Dimensional limits for effective overhanging flange width for T-beams One side of web W₁ and Least of: 5 feet f'c = 3000 psi, P₁ = 0.85 fy = 60000 psi Effective overhanging flange width, beyond face of web Least of: 8h S₁/2 1,,/8 6h S₁/2 1/12 16"

Architectural Drafting and Design (MindTap Course List)
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Chapter35: Foundation Plan Layout
Section: Chapter Questions
Problem 35.8Q
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2.5"
4.
The section below (at right) shows a floor system consisting of T-beams that connect one-way slabs. Each T-beam
has a span length, In, of 40 feet (i.e., in/out of the page). The T-beam cross-section and dimensions are shown in
more detail at left. Complete parts a-c below.
a.
b.
C.
16"
Compute by, the flange width, according to ACI318-19 requirements. Table 6.3.2.1 is shown below. Note: Sw
represents the clear distance between webs.
The neutral axis for this section is in the web. Compute the total area of steel, As, needed to resist bending in
the beam.
Compute the depth of the concrete compression area, a, for this section.
As?
6"
22"
8"
Wu= 6.15 k/ft (including self weight);
Mu= 1230 kft
Flange location
Each side of
web
Table 6.3.2.1-Dimensional limits for effective
overhanging flange width for T-beams
One side of web
2015 21
Wu
↓↓
Effective overhanging flange width, beyond face
of web
Least of:
5 feet
f'c = 3000 psi, P₁ = 0.85
fy = 60000 psi
Least of:
8h
S₁/2
1,7/8
6h
S₁/2
1/12 Y
16"
Transcribed Image Text:2.5" 4. The section below (at right) shows a floor system consisting of T-beams that connect one-way slabs. Each T-beam has a span length, In, of 40 feet (i.e., in/out of the page). The T-beam cross-section and dimensions are shown in more detail at left. Complete parts a-c below. a. b. C. 16" Compute by, the flange width, according to ACI318-19 requirements. Table 6.3.2.1 is shown below. Note: Sw represents the clear distance between webs. The neutral axis for this section is in the web. Compute the total area of steel, As, needed to resist bending in the beam. Compute the depth of the concrete compression area, a, for this section. As? 6" 22" 8" Wu= 6.15 k/ft (including self weight); Mu= 1230 kft Flange location Each side of web Table 6.3.2.1-Dimensional limits for effective overhanging flange width for T-beams One side of web 2015 21 Wu ↓↓ Effective overhanging flange width, beyond face of web Least of: 5 feet f'c = 3000 psi, P₁ = 0.85 fy = 60000 psi Least of: 8h S₁/2 1,7/8 6h S₁/2 1/12 Y 16"
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