1
st S A U N A st H O U S E
ANNA MAHNKE
HOTEL
40 psf
HOSTEL
40psf
RESTROOMS
60 psf
G D 2 FA L L 2 0 1 4 N EW ST RUC T URAL IN T ER V EN T IO N S
S A U N A B AT H S PA C E / H O S T E L / H O T E L / R E S TA U R A N T / E V E N T S PA C E
STORAGE / MECHANICAL
S T EEL JOIS T A N D COM P OS IT E DECKIN G ROOF S Y S T EM
SAUNA
P RE-CA S T, P OS T-T EN S ION ED CON CRET E “C” CHA N EL PA N ELS
HS S S QU A R E C OL U MNS ( 8 ”)
125 psf 60 psf
ROOF T OP P OOL ( 4 F T DEEP )
B AT H S PA C E ( P O O L ) min: rooftop, 4ft deep max: ground flr. 8ft deep
W O O D J O IS T F L OOR S TR U C TU R E S TE E L B E A M N E W TR USS SYS TE M ( 1 0 ’ D E E P, MOME NT C ONNE C TI ONS
N E W AN D A D D I TI ONA L HS S 2 0 ” C OL U MN S U PPOR TS F OR TR U S S E S P OOL ( 3 T HERM A L P OOLS ) M A X 8 ’ DEEP S TE E L C OMPOS TI E
200-400 psf
R E S TA U R A N T / C O M M O N S
150 psf
V E R T I C A L C I R C U L AT I O N
100 psf
C I R C U L AT I O N
100 psf
ADMIN/RECEPTION
100 psf
G R E E N S PA C E
100psf
SY ST EM S M ODEL: EXISTING EXIS T IN G CON CRETE BEAM + SLAB: O NE-WAY SYSTEM F loor an d Roof A s s emb ly: ca s t in pla ce concrete Hori zon tal S pan n i ng Members : ca s t in p la ce concrete bea m s ( 10’ o . c. )
EXIS IT N G S T RU CT U RE
Ve rtic al M e mbe rs: ma s onry wa lls Late ral force re sisting s ys tems : Exis ting ma s onry s hea r wa lls
EX I S TI N G CON CRETE F RA M E S YS TEM : ON E-WAY S YS TEM F l oor a n d Roof A s s e m b l y : c a s t i n p l a c e c on c re te H ori z on ta l S p a n n i n g M e m b e rs : c a s t i n p l a c e c on c re te b e a m s a n d g i rd e rs Ve rti c a l M e m b e rs : c a s t i n p l a c e c on c re te c ol u m n s L a te ra l f orc e re s i s ti n g s y s te m s : Ex i s ti n g m a s on ry s h e a r w a l l s + c on c re te f ra m e
CA S S G ILBER T BRICK M A S ON RY FA CA DE
existing (beam) existing (girder) new (beam or wall) new (girder) shear wall CLAY T ILE A RCH SYSTEM: O NE-WAY SYSTEM
ST E E L PAR E LLE L C H O R D T R USS + OPEN
RIBBED S T EEL JO I STS 6’ O .C.
W E B JO I ST + M E TAL DE C K I N G R O OF SY ST E M
A
B
C
D
D.4
E
F
G
H
1
2 3 FLOOR 3
4
GR AVI T Y SYSTEMS: LOAD PATH 5 6
7 7.3 8 9
A
B
C
D
D.4
E
F
G
H
1
2 FLOOR 2:
3 FLOOR 2
4
RO O F TOP POOL I N S E R T
5 6
T h e pri mary i n te rve n ti on of th i s proj e ct i s th e i n se rti on of th e rooftop pool su spe n de d
The columns on the left side of the garden wall opening would be redundant for the concrete and beam structure of bay B/C, but they would be repeated for aesthetic continuity with the needed column support for bay C/D. The added floor structure of the event space would be supported by the new trusses (replacing the exisitng trusses in the same location) which would be supported by new HSS 20” square columns with welded moment connections. Steel beams (W16) would span between the columns to support the wood joist floor system of the new event space (150psf). Beam G would also be supported from the truss above by tension rods (4) bolt connections at the panel points of the truss.
be twe e n two ( n ow de ci de dl y n e w, stron ge r, de e pe r) tru sse s. T h e ch al l e n ge goe s be yon d th i s
7 7.3
h owe ve r, i n th at th e goal i s to h ave th e e ve n t space an d bath space be l ow vi ru tal l y col u mn -fre e .
8
To ach i e ve th i s, n e w HS S 2 0 ” col u mn s wou l d re pl ace th e e xi sti n g col u mn su pports, as we l l as th e n e w tru sse s me n ti on e d. T h e tru sse s su pport
9
th e wi de span be twe e n th e col u mn s, carryi n g th e l oad of th e e ve n t space fl oor wi th con n e cti on s at th e col u mn s an d e xi si tn g mason ry wal l s on th e pe ri me te r an d wi th te n si on rods, su spe n de d from th e pan e l poi n ts of th e tru ss. T h e n e w tru sse s wi l l al so work i n con j u n cti on wi th th e pre -cast, post-te n si on e d, C-ch an e l
LATE R A L S YS TE M S & LO A D PAT H
A
pool i n se rt. T h e C ch an n e l e sse n ti al l y acts as i ts
B
C
D
D.4
E
F
G
H
own syste m ( su pporte d ve rti cal l y mostl y by th e booke n de d col u mn s) i t be h ave s mu ch l i ke a de e p sti ff be am.
LAT ERA L SYSTEM S:
LAT E R A L S Y S TE M S :
Latera l forc es a re res i s t e d t h ro u g h ro o f a n d f lo o r d ia p h r a g m s , s h e a r w a l l s , c o n c re t e m o m e n t f r a m e ,
B e c a u s e t h e t h e a t e r spa ce w a s o pe n e d u p, a n d t h e flo o r pla t e s w e re re m o ve d, st e e l br a cin g co lu m n s w e re
(and s hea r el ev a tor c o re s )
p u t i n p l a c e t o su ppo r t t h e n o r t h fa ca de . Aga in , t r a n sfe r r ign la t e r a l w in d lo a ds u p o r do w n t o t h e ro o f o r f l o o r p l a t e s t h a t a ct a s a dia ph r a gm t o dispe r se t h e lo a d. Th e dia ph r a gm s a re su ppo r t e d by t h e m a so n r y
Du e to the ov er-s truc t u re d lo a d b e a r in g m a s o n r y wa lls o f t h e e x i s t i n g b u i d l i n g , l a t e r a l f o rc e s a re effec ti v el y defl ec ted b y d ia p h r a g m s c re a t e d b y t h e f lo o r p l a t e s a n d ro o f s t r u c t u re , t i e d t o g e t h e r a n d t he res t of the bui l di n g b y t h e m a s o n r y wa lls .
1 T h e de tai l s be l ow al so h i gh l i gh t th e u n i qu e
2
The current floor of the theater space (wood joists) would be replaced with composite steel/concrete decking so as to provide an adequate moisture barrier and drainage system for the bathspace. The existing masonry wall in column F would provide vertical support in addition to the new concrete structure of the pools.
3
The concrete walls of the pool would need to be thick enough (roughly a foot thick) to support the 400psf of water load for an 8ft deep pool (at either end of the pool).
de si gn of pre cast gl ass i n to th e con cre te ch an n e l . T h i s i s a maj or de si gn moti vati on to bri n g fi l te re d l i gh t i n to th e e ve n t space an d th e
w a l l s o f t h e ba lco n ie s a n d e a st e r n fa ca de w a ll a s w e ll a s t h e w e st e r n m a so n r y w a ll su ppo r t e d by t h e st e e l
re st of th e bu i l di n g. T h e pre -cast ch an n e l al l ows
f r a m e s t r u ct u re o f t h e a lle y po r t io n .
for stru ctu ral su pport for th e wate r l oad, maki n g a basi n for th e pool me mbran e to be bu i l t u pon an d l e avi n g e n ou gh voi d space for th e pool ’s me ch an i cal e qu i pme n t to be su pport by th e ch an n e l .
FLOOR 1
4 5 6
7 7.3
DETA I L S: OL D & NEW
GROUND FLOOR:
It’s possible that some of the floor structure surrounding the perimeter of the pool and the existing lateral bracing columns could be maintained, although it’s likely more practical to replace the entire wood joist floor structure of the current theater space, especially with the added amounts of moisture from the pools. Between column B and C, a portion of the floor will be removed to bring light to the basement. This opening opens all the way to the roof to create an atrium and space for a vertical garden wall. The structural consequences of this are the need for stuctural, fire-rated, steel columns to support the floors originally supported by the load-bearing walls of the existing bays. More specifically, the columns would span 6 ft o.c. to maintain the exisitng clay tile floor/ceiling system of bay C/D of which the arches meet beams at 6ft o.c.
8 9
A
B
C
D
D.4
E
F
G
H
1
2 3 4 FLOOR 0
5 FOUNDATION PLAN:
6 Exi st in g m asonry wall Slab on steel decking Steel deck W12 beam Embe ddin g c onc rete
7 7.3 8 9
“Cake Tower” foundation footings support masonry walls and clay tile arch floor systems thoughought. Much of the wall in column G would be removed to make way for the poured concrete pool structure. Footings for the new columns supporting the new trusses (supporting the rooftop pool) would likely need to be reinforced in addition to the current column trusses that transfer loads into the existing loadbearing foundation walls.