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448 John Hancock Tower Trump Tower Sears Tower (Willis) Woven Site Plan: Wolf Point, Chicago, IL N scale: 1:500 Building Section scale: 1/32” = 1’-0” chilled water pipes chiller Structural Model scale: 1:50 Materials: Basswood, white chipboard, 1/8” corrugated cardboard Extremly rigid, yet delicate and light. Bass wood sticks, despite how delicate they appear, are very rigid once they have been woven and laminated. A test of lateral forces reveal that this model could withstand significant loads. Form Concept (1) Begin with a basic tower form since this site’s prominence on the Chicago River calls for an iconic piece. (2) Add an atrium. (3) The form is bulged at the center and (4) the atrium is sloped to increase daylighting potential. (5) Finally, the form is sliced at the top to provide views of Lake Michigan to the high end residential units on the northwest and to complete its iconic persona. 1 2 3 4 5 parking retail/mall offices hotel apartments condominiums gardens sky deck Program Atrium Study Burj Al Arab by Tom Wright (WS Atkins PLC) Woven Jin Mao Tower by SOM 1 Bligh Street by Architectus & Ingenhoven Architects Sante Fe Building by Frederick P Dinkelberg (DH Burnham & Company) Atrium Building Atrium Energy Strategies Heating Cooling Daylighting winter summer winter summer The central atrium and gardens act as buffers from the winter climate and provide heat to adjacent spaces. The atrium acts as a thermal chimney, inducing natural ventila- tion, by drawing air through the gardens during the summer. The core is infused with winter sunlight through the gardens while the atrium provides larger glazed areas to adjacent spaces. Structure Circulation View of Woven down Chicago River from Hotel 71 Chicago River view of Woven at sunset “Make no little plans. They have no magic to stir men's blood and probably themselves will not be realized. Make big plans; aim high in hope and work, remembering that a noble, logical diagram once recorded will never die, but long after we are gone will be a living thing, asserting itself with ever-growing insistency... Think big.” - Daniel Burnham Why Wood? Renewable Resource When wood is sourced from sustainably managed forests, like those in Europe & N. America, it is a more environmentally sensi- tive material than steel & concrete. Less Embodied Energy Steel & concrete require a much greater amount of embodied energy than wood. Sequesters Carbon Wood sequesters between 1-1.6 tonnes per cubic meter of carbon, species-dependent, offsetting its carbon footprint. Fire Resistant Heavy timber chars, which insulates it from further heat penetra- tion, keeping the overall structural integrity of the member intact. Cost Competitive As wood becomes more popular and forests continue to be man- aged sustainably, the cost of wood will decrease and remain comparable to steel & concrete. Self-Damping Wood is great at self-damping which makes it excellent for acoustics and seismic action. Reduced Thermal Bridging Wood is a poor conductor of heat, resulting in minimal heat gain or loss when passing from inside to oustide. woven a wooden skyscraper hardwood finish floor steel tension cable 3.5” wood decking glue laminated beam (glulam) laminated veneer lumber (LVL) chilled beams Wall Section Detail Diagrid Base Joint Detail laminated veneer lumber (LVL) steel plates threaded union tension rod concrete base anchor bolt The base detail was designed to prevent uplift, which was a concern since the building would be very light when compared to its steel and concrete counterparts. The LVL is wider at the base, creating an effect similar to that of an axe - whenever the axe is swung, it firmly tightens the wedge of metal onto the handle - this same action would be achieved when uplift occurs. External Diagrid Joint Detail Internal Diagrid Joint Detail laminated veneer lumber (LVL) steel pierced tube steel plate steel tension cable glue laminated beams (glulam) steel hanger external joint internal joint wall section detail base joint Woven is constructed using 1.75"x1'x30' strips of laminated veneer lumber (LVL), which are assembled using Zollinger's lamella system. This type of system does not require highly skilled laborers and can signifi- cantly reduce construction time since assembly is quick and easy. Because the members are relatively small - two laborers could handle a single LVL - the engineered wood would be manufactured in bulk, producing little waste, and can be easily transported to site. Why wood? The world is urbanizing. According to UNDESA, 70% of the world's population will be urban by 2050. Cities are growing, and so is the need to preserve our environment. Since wood has a lighter environmental impact than today's structural materials - steel & concrete - the question we should really be asking is "why not wood?" Woven challenges the public's perception of wood as a viable structural ma- terial for skyscrapers - not only is it possible, but it is more sustainable by far. A study of atriums played an important role in the realization of the form. Not only does the core atrium provide day lighting, it also assists with natural cooling and heating by inducing natural ventilation in the summer and acting as a buffer in the winter. This helps the building maintain a constant temperature with little fluctuation. The lamella pattern provides a layering system that allows the building to expand ever upward by increas- ing the column size to accommodate additional loads. This system is adaptable, flexible and increasingly sustainable. Woven demonstrates that wooden skyscrapers are possible. A chilled beam cooling system utilizes the Chicago river to cool the water in the closed-loop before undergoing additional chilling. This method is more efficient and economical than a standard HVAC system because water carries more energy than air, and does not need to be as cold to deliver the same cooling ability. observation deck/garden level 54 residential lobby level 36 hotel lobby automated parking level 18 office level 12 garden level 6 Typical Hotel Plan N scale: 1/32” = 1’-0”
