Page 167 - ICC IEBC 2018

APPENDIX C

one of the methods prescribed in Sections C104.5.1 or for wood connections, provided that the sill plate is
C104.5.2. The particular method chosen shall correspond to anchored to the wall on each side of the gusset angle
1
the framing system and type of wall construction encoun- by a / -inch-diameter (6.4 mm) masonry screw with
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3
tered. 2 / inches (70 mm) of embedment into the concrete
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1
[BS] C104.5.1 Gable end frame. The bottom chords of or masonry wall. A / -inch (6.4 mm) washer shall
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the gable end frame shall be attached to the wall below be placed under the heads of the masonry screws.
using gusset angles. Not fewer than two fasteners shall be [BS] C104.5.2 Conventionally framed gable end wall.
installed into the bottom chord. The gusset angles shall be Each stud in a conventionally framed gable end wall,
installed throughout the portion of the gable end where the throughout the length of the gable end wall where the wall
gable end wall height is greater than 3 feet (91 cm) at the height is greater than 3 feet (914 mm), shall be attached to
spacing specified in Table C104.5.1. Connection to the the bottom or sill plate using a stud to plate connector with
wall below shall be by one of the following methods: minimum uplift capacity of 175 pounds (778 N). The bot-
1. For a wood-frame wall below, not fewer than two tom or sill plate shall then be connected to the wall below
fasteners shall be installed. The fasteners shall be of using one of the following methods:
the same diameter and style specified by the gusset 1. For a wood frame wall below, the sill or bottom plate
angle manufacturer and sufficient length to extend shall be connected to the top plate of the wall below
1
through the double top plate of the wall below. using / -inch-diameter (6.4 mm) lag bolt fasteners of
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2. For a concrete or masonry wall below without a sill sufficient length to penetrate the bottom plate of the
plate, the type and number of fasteners into the wall upper gable end wall and extend through the bottom
shall be consistent with the gusset angle manufac- top plate of the wall below. A washer sized for the
turer’s specifications for fasteners installed in con- diameter of the lag bolt shall be placed under the
crete or masonry. head of each lag bolt. The fasteners shall be installed
at the spacing indicated in Table C104.5.2.
3. For a concrete or masonry wall below with a 2x sill
plate, the fasteners into the wall below shall be of 2. For a concrete or masonry wall below, the sill or
the diameter and style specified by the gusset angle bottom plate shall be connected to the concrete or
1
manufacturer for concrete or masonry connections; masonry wall below using / -inch-diameter (6.4
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but, long enough to pass through the wood sill plate mm) concrete or masonry screws of sufficient length
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and provide the required embedment into the con- to provide 2 / inches (70 mm) of embedment into
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crete or masonry below. Alternatively, the gusset the top of the concrete or masonry wall. A washer
angle can be anchored to the sill plate using four sized for the diameter of the lag bolt shall be placed
1
each 1 / -inch-long (38 mm) fasteners of the same under the head of each lag bolt. The fasteners shall
2
type as specified by the gusset angle manufacturer be installed at the spacing indicated in Table
C104.5.2.
[BS] TABLE C104.4.1
ELEMENT SIZING AND SPACING FOR L-BENT RETROFIT METHOD
RETROFIT CONFIGURATION
RETROFIT ELEMENTS
A B C D
Minimum size and number of Horizontal Braces 2 x 4 2 x 4 2 x 4 2 each 2 x 4
Minimum size and number of Retrofit Studs 2 x 4 2 x 6 2 x 8 2 each 2 x 8
Minimum number of fasteners connecting each end
of straps to Retrofit Studs or to Horizontal Braces 6 9 12 8 on each strap
1
#8 screws or 10d nails 1 / " long
4
Minimum number of fasteners to connect
Compression Blocks to Horizontal Braces #8 6 8 10 12
screws or 10d nails 3" long
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
[BS] TABLE C104.4.2
ELEMENT SIZING AND SPACING FOR U-BENT RETROFIT METHOD
RETROFIT CONFIGURATION
RETROFIT ELEMENTS
A B C D
Minimum size and number of Horizontal Braces 2 x 4 2 x 4 2 x 4 2 each 2 x 4
Minimum size and number of Retrofit Studs 2 x 4 2 x 6 2 x 8 2 each 2 x 8
Minimum number of fasteners connecting Straps to each edge of Horizontal
1
Braces #8 screws or 10d nails 1 / " long 6 7 7 6 on each side of strap
4
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.

148 2018 INTERNATIONAL EXISTING BUILDING CODE ®
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