cribedi
subseque
tsectio
si
thefollowi
gShearWallSystemsWhe
shearwallsarecompatiblewithotherfu
ctio
alrequireme
tstheyca
beeco
omicallyutilizedtoresistlateralforcesi
highrisebuildi
gsForexampleapartme
tbuildi
gs
aturallyrequirema
yseparatio
wallsWhe
someofthesearedesig
edtobesolidtheyca
actasshearwallstoresistlateralforcesa
dtocarrytheverticalloadaswellForbuildi
gsuptosome20storisetheuseofshearwallsiscommo
Ifgive
sufficie
tle
gthsuchwallsca
eco
omicallyresistlateralforcesupto30to40storiesormoreHowevershearwallsca
resistlateralloado
lythepla
eofthewallsie
oti
adiretio
perpe
diculartothemThereforeitisalways
ecessarytoprovideshearwallsi
twoperpe
diculardirectio
sca
beatleasti
sufficie
torie
tatio
sothatlateralforcei
a
ydirectio
ca
beresistedI
additio
thatwalllayoutshouldreflectco
sideratio
ofa
ytorsio
aleffectI
desig
progresstwoormoreshearwallsca
beco
ectedtofromLshapedorcha
elshapedsubsystemsI
deedi
ter
alshearwallsca
beco
ectedtofromarecta
gularshaftthatwillresistlateralforcesveryefficie
tlyIfallexter
alshearwallsareco
ti
uouslyco
ectedthe
thewholebuildi
gsactsastubea
dco
ectedthe
thewholebuildi
gsactsasatubea
disexcelle
tShearWallSeystemsresisti
glateralloadsa
dtorsio
Whereasco
creteshearwallsarege
erallyofsolidtypewithope
i
gswhe
ecessarysteelshearwallsareusuallymadeoftrussesThesetrussesca
havesi
glediago
als“X”diago
alsor“K”arra
geme
tsAtrussedwallwillhaveitsmembersactesse
tiallyi
directte
sio
orcompressio
u
dertheactio
ofviewa
dtheyoffersomeopportu
itya
ddeflectio
limitatio
poi
tofviewa
dtheyoffersomeopportu
ityforpe
etratio
betwee
membersOfcoursethei
cli
edmembersoftrussesmustbesuitableplacedsoas
ottoi
terferewithrequireme
tsforwio
dowsa
dforcirculatio
servicepe
etratio
sthoughthesewallsAsstatedabovethewallsofelevatorstaircasea
dutilityshaftsform
aturaltubesa
darecommo
lyemployedtoresistbothverticala
dlateralforcesSi
cetheseshaftsare
ormallyrecta
gularorcirculari
crosssectio
theyca
offera
efficie
tmea
sforresisti
gmome
tsa
dsheari
alldirectio
sduetotubestructuralactio
Butaproblemi
thedesig
oftheseshaftsisprovidedsufficie
tstre
gtharou
ddoorope
i
gsa
dotherpe
etratio
sthroughtheseeleme
tsForrei
forcedco
creteco
structio
specialsteelrei
forceme
tsareplacedarou
dsuchope
i
gI
steelco
structio
heaviera
dmorerigidco
ectio
sarerequiredtoresistracki
gattheope
i
gsI
ma
yhighrisebuildi
gsacombi
atio
ofwallsa
dshaftsca
offerexcelle
tresista
cetolateralforceswhe
theyaresuitablylocateda
tco
r