WEEK 7 LOGBOOK
W07 01_STUDIO REPORT Structural system
Precast panel: panel is a deep vertical member in a structure designed to transfer load vertically, and panels in this building are all pre-cast that increase the efficiency of the construction process. While the panel is put up and built into the site, temporary bracing made by steel need to support the members until they are fixed to the ground and do not move anymore
Precast column: columns are vertical structural elements that experiencing compression axial load. While a load is applied at the top of this member, a reaction force will act at the bottom with a same magnitude but an opposite direction. Columns here are also pre-cast with precast reinforcement core inside the column and they are also supported by temporary steel bracing.
This is a column poured on site with an in situ core at the inside, and formworks are required here.
Form work for the slab.
Two-way reinforcing concrete slab: slab is a horizontal member used to carry mainly vertical load and also horizontal load. The slabs in this site are poured in site, and a lot of formworks are done to hold the concrete until it turns to a solid. Reinforcement are used here in two direction in order to bear more load or to resist lateral forces
Construction system Floor system: in situ concrete slab—posttensioned slab Post-tensioned slab is a kind of in situ concrete slab. During the pouring process of this slab, internal forces are added to the member by putting some high-strength steels after the concrete is placed in order to counteract the external load after construction (Concrete Construction, 2014). Formwork of an in situ concrete member is demonstrated below
Plywood sheets that are going to be put at the top of the joists and under the concrete
Steel Stud Timber Joists
Sheet bracing
Double-post metal shores with bracing used to support the formwork at the top, they can hold heavier load than single-post metal shores
Wall system: concrete column + concrete panel; steel stud wall The wall system of this site consists of precast concrete columns (inner area), panels (exterior) and steel stud wall with fire-rated plasterboard at the back as sheet bracing. Fire-rated plasterboards are material used to protect human’s life during a fire. It can hold back the fire for some time to allow people go away from the room.
Material & Strategy & Joints
Structural Timber
Material use: • Plaster board: for wall cladding and is fire-rated that could resist fire for a while and ensure people to get out of the room without hurt. • Timber: plywood, used mainly for formwork in this site; structural timber: for structural members • Concrete: reinforcing concrete both poured in site and precast, precast concrete has higher quality and is standardized but in-situ concrete might be better fit into the site and better joint with other elements. The joints used for pre-cast material are construction joints and structural joints, for in-situ material, the joints are construction joints • Steel: H-beams are used for formwork
Ching, 2014, movement joints of concrete foundation wall, 7.49
Fire-rated Plaster Board
Crane Construction site
Construction site
The crane is set inside the constructing area due to the site limitation that there are a lot of finished buildings around the site and people live or work in those places. Therefore, a mobile crane could negatively influence the life of other people. This crane is positioned at the center of the site that could increase the work efficiency that the distances of each parts of the site to the center are pretty much the same
W07
Material: Masonry, concrete, water body (envs10003, W07 c1)
02_LEARNING LOOP Plastic: elementsàmonomersàpolymers 1. Thermoplastics: can be shaped many times 2. Thermosetting: only shaped once 3. Elastomers: synthetic rubber (envs10003, W07 m2) Also used for control joints and waterproof
EPDM -
Moisture
Seal
Keep it away
Neutralize the force -
Silicon at the connection; short lifespan -
Slop on the roof + gutter + downpipe
Storm water system Overlapping cladding Sloping at opening Sloping on the ground
Gravityàslop or overlap - Surface tensionàDrip - MomentumàStructure at gaps to slow the movement - Air pressureàPEC (envs10003, W07 c1)
Thermal insulation Thermal breaks Double/ triple glazing Control conduction
Synthetic Rubber (envs10003, W07 m1)
Gaskets Sealant
Remove opening
-
Curtain -
Control heat loss
Reflective/ light coloured surface Shading system
Roof system
Wall system
Roof tile Weatherboard
Enclosure system
Heat
Control radiation Plastic or reflective foil
Delay the transfer of heat: Capture warm during the day and release at night Thermal Mass Control air leakage -
Eliminate opening Wrap the building Weather stripping around door
Air leakage and water penetration occur at: (envs10003, W07 c1)
Opening: such as window or door, the wall system or enclosure system, usually use material like timber, plasterboard, masonry concrete, glass, etc.
Water is present at the opening or air pressure difference exists
Force that can move water towards the opening
Remove anyone can achieve the goal but better to remove 2
W07 03_GLOSSARY APPENDIX Drip: is a kind of flashing at the edge of a roof to prevent capillary action (Ching, 2014).
Down Pipe: is a vertical object installed on the external wall to transfer water accumulating in the gutter on the roof downward to a dry well or a storm sever system (Ching, 2014).
Gutter: is an object along the eave to collect rainwater flowing along the roof slope (Ching, 2014).
Flashing: is a thin and continuous sheet made by impervious material to avoid water entering into a structure at a joint or an angle and it could be concealed or exposed (Ching, 2014). Flashing can be installed in a roofing system, wall system or any joint or connection (Ching, 2014).
Insulation: material used for the enclosure system for separation and to reduce the amount of heat transferred into the indoor area, which could be made by a lot of material (Ching, 2014).
Parapet: is the wall connecting with the roof at the eave (Ching, 2014).
Sealant: it is located at the connection point of a structure made by silicon to seal small openings on the enclosure system
Vapour barrier: or vapour retarder, is a thin layer between the thermal insulation and roof decking to prevent water from going into the roof structure (Ching, 2014).
W07 04_REFERENCE LIST Ching, F. (2014). Building Construction Illustrated (5th ed.). Hoboken, New Jersey: John Wiley&Sons. Envs10003. (2014, April 16). W07 c1 Detailing for Heat and Moisture [Video file]. Retrieved from http://www.youtube.com/watch?v=Lhwm8m5R_Co&feature=youtu.be Envs10003. (2014, April 15). W07 m1 Rubber [Video file]. Retrieved from http://www.youtube.com/watch?v=OPhjDijdf6I&feature=youtu.be Envs10003. (2014, April 15). W01 m2 Plastics [Video file]. Retrieved from http://www.youtube.com/watch?v=5pfnCtUOfy4&feature=youtu.be