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UBC(1921.6.6)

SHEARWALL DESIGN FOR AXIAL & FLEXURE LOADS

---- 1921.6.6.3 :

For Pu

---- 1921.6.6.4:

1> Pu6A-./? 0.1 For S&++!r, W%)) S!,o# >

Pu6A-./? 0.05 For U#(&++!r, W%)) S!,o# >

2> ;u6@u.L 1.0

3> @u 3.A*. . 4 ;u6@u.) 3 For S7 0.25.A*.

NOTE :

IF THIS CONDITION IS SATISFIED , THEN NO NEED FOR BOUNDARY ZONE

ELEMENTOTHERWISE , BOUNDARY ZONE ELEMENT SHOULD BE

CONSIDERED

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WALL SEGMENTS WITH HORIZONTAL LENGTH-TO-THICNESS RATIO

LESS THAN 2.! SHALL BE DESIGNED AS COLUMNS.

1921.6.6.6 " SHEARWALL BOUNDARY ZONE DETAIL R#F$

BOUNDARY ZONE TH7C9NESS )u61

BOUNDARY ZONE 7NTO THE WEB 12 7NTO THE WEB

;7N7;U; BOUNDARY ZONE LENGTH 1

CONFINEMENT R#F :

FOR HOOPS6CROSS T7ES A( 0.0.(../?6/&

HOOP SPAC7NG S+%

.D,%.o/."%rL%r-!( @!r,%) B%r>

= CONF7N7NG LAP SPL7CE OF

@ERT7CAL R6F>

HOOP RAT7O LENGTH 6 W7DTH 3

HOOP6CROSS T7E SPAC7NG ALONG THE WALL 12

NOTE :

ALTERNATE %ERTICAL BAR SHALL BE CONFINED BY HOOCROSS TIE

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HORIZONTAL REINFORCEMENT SHALL NOT BE LA& S&LICED WITHINTHE

BOUNDARY ZONE.

%ERTICAL R#' :

A( 0.005.A- Bou#$%r& Zo#!>

2 5 "%r(

A( 0.0025." FOR BOTH FACES>

S+% 1

3. ,#!(( o/ %))>

NOTE :

%ERTICAL REINFORCEMENT SHALL BE &RO%IDED TO SATISFY ALL TENSION AND

COM&RESSION RE(UIREMENTS.

LA& S&LICES OF %ERTICAL REINFORCEMENT WITHIN THE BOUNDARY ZONE

SHALL BE CONFINED BY HOO&S OR CROSS-TIES.

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%ERTICAL AND HORIZONTAL R#' E)CE&T BOUNDARY ZONE :

A( 0.0025." FOR BOTH FACES>

S+% 1

3. ,#!(( o/ %))>

NOTE :

HOR7ZONTAL R6F SHALL NOT BE SPL7CE6LAP W7TH7N BOUNDARY ZONE

@ERT7CAL RE7NFORCE;ENT SHALL BE PRO@7DED TO SAT7SFY ALL TENS7ON

AND CO;PRESS7ON RE8U7RE;ENTS.

@ERT7CAL RE7NFORCE;ENT NEED NOT BE ENCLOSED BY LATERALT7ES 7F

@ERT7CAL RE7NFORCE;ENT AREA 7S NOT GREATER THAN 0.01 T7;ES GROSS

CONCRETE AREA OR WHERE @ERT7CAL RE7NFORCE;ENT 7S NOT RE8U7RED

AS CO;PRESS7ON RE7NFORCE;ENT.

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FOR GRA%ITY WALLS

%ERTICAL R#':

A(+,# 0.0015" Bo F%!(>

HORIZONTAL R#' :

A(+,# 0.0025" Bo F%!(>

MINIMUM RATIO OF %ERTICAL * HORIZONTAL R#F

1914.3.2:

M++ /0+ ' /+50 /+'/5 0/0o -ro(( o#r!! %r!% (%)) "!:

1. 0.0012 /or $!/or+!$ "%r( #o )%r-!r %# No. 5 , % (!,/,!$ &,!)$ (r!#- #o )!(( %#

0000 (, =13.I ;P%> or

2. 0.0015 /or o!r $!/or+!$ "%r( or

3. 0.0012 /or !)$!$ ,r! /%"r, )%,# or $!/or+!$> #o )%r-!r %# W31 or D31.

1914.3.3:

M++ /0+ ' 7/+80 /+'/5 0/0o -ro(( o#r!! %r!% (%)) "!:

1. 0.0020 /or $!/or+!$ "%r( #o )%r-!r %# No. 5 , % (!,/,!$ &,!)$ (r!#- #o )!((

%# 0000 (, =13.I ;P%> or

2. 0.0025 /or o!r $!/or+!$ "%r( or

3. 0.0020 for welded wire fabric (plain or deformed) not larger than W31

or D31.

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NOTE :

11=.3.=. W%))( +or! %# 10 ,#!( 25= ++> , !! "%(!+!# %))( (%)) %*! r!,#/or!+!#

/or !% $,r!,o# )%!$ ,# o )%&!r( %r%))!) , /%!( o/ %)) ,# %or$%#! , ! /o))o,#-

1.O#! )%&!r o#(,(,#- o/ #o )!(( %# o#! %)/ %#$ #o +or! %# o ,r$( o/ o%) r!,#/or!+!#

r!Ju,r!$ /or !% $,r!,o# (%)) "! )%!$ #o )!(( %# 2 ,#!( 51 ++> or +or! %# o#! ,r$ !

,#!(( o/ %)) /ro+ !!r,or (ur/%!.

2.T! o!r )%&!r o#(,(,#- o/ ! "%)%#! o/ r!Ju,r!$ r!,#/or!+!# ,# % $,r!,o# (%)) "! )%!$

#o )!(( %# 36= ,#1 ++> or +or! %# o#! ,r$ ! ,#!(( o/ %)) /ro+ ,#!r,or (ur/%!.