Constructing Environments Karen Dionisio-See Option 1 SPANMAN
Structure & Construction
http://dornob.com/retro-modern-mod-metal-mansard-roof-adds-attic-space/#axzz2dM5sFbj6
The structure of the roof is a 90-degree mansard roof that allows the ceiling to be extended in various heights. This enables the bottom of the roof to be open and free from structural members. However, in terms of elevating the ceiling and holding up the top of the roof, steel columns are added on top of existing walls and posts.
The top of the roof is based on a flat roof system, which have a similar structure to floor joist framing (Ching 2008: 6.17). Roof beams are spanned on top of the steel columns, which serve as the framing for full glass windows. Rafters are added above and perpendicular to the roof beams that acts as rafter supports. At the ends of the rafters are rim joists or headers to support the members (Ching 2008: 4.26). These rafters support sheathing boards or shingles for the exterior finishing of the roof system. In this roof structure, the sheathing boards are exposed that should provide protection and cover for the system. These boards also strengthen the rafters by resisting deformations and stress factors such as twisting and buckling (Ching 2008: 4.26). Some structural members of the roof include overhangs that are supported by the roof beams. At the sides of the cube like structure of the roof, full glass windows are spanned and supported by steel frames. Moreover, on the east and west side of the main roof, flat warren trusses are exposed and are used as window frames. These trusses act as mullions that separate the windows on the roof (Ching 2008: 8.22).
Constructing Environments Karen Dionisio-See Option 1 SPANMAN
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Structure & Construction The roof is divided into four sections: overhang, entrance, bathroom and main. 1. Overhang a. Height – 250mm b. Members – RB3, RB4, RB5, R3 c. Support – wall system on the main roof and cantilevers to the wide porch of the house. d. Windows - no 2. Entrance a. Height – 500mm b. Members – RB6, R4 c. Support – wall of the main room; bathroom d. Windows - yes 3. Bathroom a. Height – 750mm b. Members – RB7, RB8, R5 c. Support – wall of the west side of the bathroom; posts near the toilet d. Windows - yes 4. Main a. Height – 1000mm b. Members – RB1, RB2, R1, R2 c. Support – wall in main room; includes overhanging rafters on the southwest side of the roof that serves as a cover for the extension porch d. Windows – yes
Constructing Environments Karen Dionisio-See Option 1 SPANMAN
Materials
Materials of the roof structural members are made of hardwood and pine timbers. Windows are made of tempered glass for strong and less brittle materials that can withstand the weather and lateral forces. Window frames are made of steel and trusses are made of timber. Sheathing boards are made of plywood; under the sheathing boards are dens glass sheathing boards for further insulation and resistance from the climate and moisture (DoItYourself.com 2013).
Specific Timber Materials using Spanman
Constructing Environments Karen Dionisio-See Option 1 SPANMAN
Specific Timber Materials using Spanman
Aesthetic Design
The aesthetic design has a similar form as a spiral staircase. Achieved by different heights of the roofs.
http://www.digsdigs. com/10-the-most-cool-spiral-staircase-designs/
Constructing Environments Karen Dionisio-See Option 1 SPANMAN
Function
Aesthetic Design
Exposed sheathing boards --> to honour the main materials used in the structure.
http://www.builditsolar. com/Experimental/TreeShade/TreeShade.htm
Trusses on the windows of the main room – add shadow effects like trees when sunlight shines from east to west. Windows – let natural light enter --> more sustainable; saves energy.
The different sections of the roof portray the different parts or functions in the house. For instance, the main room needs to be the highest among the others since it’s the main room and the kitchen in inside - to let smoke/ air to flow. The whole roof system is constructed in a way to withstand weather and outside forces. Since the location of the house does not experience extreme rainfall and snow, a flat roof is considerably good for the house.
Constructing Environments Karen Dionisio-See Option 1 SPANMAN
Model at a 1:20 Scale
Form model at 1:50