C
D
1
2
3
page 131
Unit 13
Commercial Framing Prints
Learning Objectives

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

Recognize various types of
concrete floors
Understand concrete reinforcing
notation
Read beam & column schedules
Identify various structural
members
Commercial Framing
Large commercial &
industrial buildings are
constructed around
reinforced concrete &
structural steel
Unit 13
page 131
Reinforced Concrete
floor systems


one-way floor system
two-way floor system
waffle slab or dome
 beam & joist

Unit 13
pages 131-132
Reinforced Concrete
floor systems - one way
Unit 13
page 132
Figure 13 - 2
Reinforced Concrete
floor systems - one way
Unit 13
page 132
Pan Joist system
Concrete beam
Reinforced Concrete
Unit 13
page 132
floor systems - two way waffle
Figure 13 - 3
Reinforced Concrete
Unit 13
page 132
floor systems - two way waffle
Waffle Pan or dome system
Reinforced Concrete
floor systems two way flat plate
Unit 13
page 13
Figure 13 - 4
Steel Reinforcement
rebar
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
Unit 13
page 132
use to provide additional strength
to the concrete to resist forces in
tension, shear, and compression
designated by
number of bars
 size of bars

 represented in eighths of an inch

placement or spacing
Steel Reinforcement
Unit 13
page 132
rebar
drawing identification
2 - # 5 x 19’-0” @ 2’ - 6” o/c
place on 1 1/2” chairs
8 - #10 x 14’-6” @ 12” o/c top
bars size
number of bars
location
bar spacing
length of bar
Steel Reinforcement
rebar grades
Unit 13
pages 132-133
Figure 13 - 5
Expansion Joints
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Unit 13
page 132
placed between a slab & wall
and around columns
used to to allow movement
caused by expansion and
contraction
located by the designer on the
drawings
Expansion Joints
Unit 13
page 133
Figure 13 - 6
Columns & Beams
Unit 13
pages 132 - 133
columns
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columns - are vertical support
members designed to carry loads
from the floors above down to the
foundation
reinforced with reinforcing steel
shown on drawings on a grid
system of numbers and letters
specified on a column schedule
Columns
Unit 13
page 133
Figure 13 - 7
Column Schedules
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

identify the size and shape of
column
number, size, & location of bars
size & spacing of ties
Columns
typical centerline layout
C
centerlines
D
1
2
3
Column Schedules
Column #
size
rebar
C1
C2
C3
D1
D2
D3
24”
24”
24”
20”
20”
20”
8 - #9
6 - #7
ties
#3 @ 4”
Splicing Reinforcement


splicing is required to transfer
the stresses through the
reinforcing steel
accomplished by overlapping the
bars by a number of times the
size of the bars
Splicing Reinforcement
Unit 13
page 134
lapped up thru
the column
some tie into
the beam
Figure 13 -9
Splicing Reinforcement
Column reinforcing
Footing reinforcing
Slab Reinforcement
Slab reinforcing
Slab Reinforcement
Unit 13
page 135
Figure 13 - 11
Slab Reinforcement
post tension
steel
slab steel
beam steel
Structural Steel

Unit 13
page 134
structural steel refers a
buildings constructed from
structural steel shapes
wide flange beams - columns
 I-beams - beams
 angles - brick ledges
 pipes - columns, handrail
 tubes - columns
 “C” channels
 tees

Structural Steel

Unit 13
page 136
loads are designed so floor loads
are transferred to beams, beams
to columns, and columns down to
the foundation
Figure 13 - 14
Structural Steel
Floor Framing
Plan
Bar Joists
Beams
Columns
Structural Steel
Joists - Steel
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Unit 13
pages 134 - 135
typically refereed to open-web
joists
used for floor and roof structures
support loads more efficiently
than steel shapes
more affordable
designated by Steel Joist
Institute
Joists - Steel

joist labeling
shortspan
 longspan
 deep longspan


two grades
J series
 H series

Unit 13
pages 134 - 135
Joists - Steel
Unit 13
page 137
Figure 13 - 15
Top
Bearing
Bottom
Bearing
Test Your Knowledge

Unit 13
take 10 minutes to complete the
test on page 138
Reinforced Concrete and
Structural Steel Framing

Unit 13
Take 10 minutes & complete
the questions for Activity 13-1
on page 139 refer to large
prints 13-1a and 13-1b
Reinforced Concrete and
Structural Steel Framing

Unit 13
Take 10 minutes & complete the
questions for Activity 13-2 on
pages 140-141 refer to large
prints 13-2a and 13-2b
END OF UNIT 13