building construction 2 ; project 1 report
TRANSCRIPT
Prepared by:
Chia Sue Hwa / 0317920
Liu Jyue Yow / 1007P74080
Ang Wei Yi / 0317885
Fong Tze Ying / 0324073
DarshiIni Vig / 0319359
Arvindhan Balasingam / 0319753
Tutor: Ms Alice
Experiencing and understanding skeletal construction is important as it is one of the most widely
used structures for building support. A skeletal structure is in which weight is carried by a skeleton or
framework, as opposed to being supported by walls. A frame is a structure used to resist vertical
forces and lateral forces in conjunction with its foundation to provide strength and stability for the
structure.
For this assignment, we were assigned to construct a temporary bus shelter (4 X 2 X 3 meters)
showing our understanding of the skeletal structure in and applying the usage of recyclable
materials relating to its function.
After researching several types of skeletal construction, our team decided to utilise the combined
strength of steel and timber to construct our temporary bus shelter. Combining the two materials
exudes a old mix new atmosphere for the shelter: the modern look of steel connections merged
with familiar timber creates a structurally sound yet comfortable rest area for the public. Topped
off with a clean roof, the open-air shelter becomes a sheltered yet bright environment for users. By
applying a variety of advanced construction techniques, our team was able to experiment more
in terms of aesthetic form.
The ‘temporary’ aspect of the shelteR plays an important role. Steel, a readily available material
quickens the process of mass construction with timber. Mass production of these connections are
highly doable, and can be easily assembled and disassembled.
Our team sourced wood pieces from local
hardware shops, while also utilising recycled pieces
from the university’s workshop. Besides applying
steel joints to increase the flexibility of timber
construction of the roof to column, and column to
floor, a variety of simple timber joints are applied as
well for both flooring and roofing. Recycled steel
was customised into specific steel joints through
laser visits to a steel manufacturer, while ready-
bought steel reinforcement was also used.
Scale: 1:20Description: Small models showingbasic form and joint connectionwere constructed to betteranalyse and understand howsimple post and beam skeletalconstruction works.
Scale: 1:5Description: A real-scale modelwas made to demonstrateskeletal post and beam structureconnected by pin joints clearly.
Scale: 1:10Description: For interim, the use of timbermixed steel base connections wereshown in the model.
Scale: 1:20Description: For interim, a final model showingthe structure and spaces of the bus shelterwas constructed. Types of necessary jointswere now identifiable. However, some slightdimension changes were still made during theactual construction.
Floor plan.
Front elevation. Roof plan. Side elevations
Sketches, annotations and notes of early research on initial designs.
FLOOR PLAN
ROOF STRUCTURE PLAN
FRONT ELEVATION BACK ELEVATION
SIDE ELEVATIONS
Primary Secondary Rafters
L Brackets and screws are used to hold in place and attach the roof structure to the columns.
Screws, bolts and nuts are used to tighten the joints and fix the columns within the welded base.
Four columns extends up between the flooring and the roof structure, held in
place by welded bases, and bracings.
Planks of wood were trimmed down to the appropriate sizes and secured down onto the floor framing with nails.
ADVANTAGES DISADVANTAGES
WOODEN PLANKS / PLYWOOD
1. Withstand loads and forces
2. Flexibility in construction
3. Ready-cut dimensions
4. Rustic look and feel
1. May
crack/splinter
when screwed
STEEL CONNECTIONS
1. Increases load-bearing
ability of structure
2. Recycled from old steel
3. Insect resistant
4. Modern look
1. Adds weight to
model
2. Corrode if
exposed to
water
L-ANGLES / NAILS / SCREWS
1. Holds timber together
effectively
2. Highly useful for almost all
joints
3. Ready-bought in sizes and
shapes
1. Less
aesthetically
pleasing
2. Bulky when high
in numbers
Wooden planks Plywood
Screws and nailsL-angles
Steel connections Fixed and pin joints
SKELETAL LOAD TRANSFER– TWO WAY SYSTEM Uniform distributed load in two directions Force is channelled from beams to columns
EXTERNAL FORCES – LOADS STATIC LOAD The weight of the roof structure is permanently attached to the columns DYNAMIC LOADCaused by users that get on and off the shelter
CONCLUSION:1) The load is distributed evenly throughout the
structure, so that no single part is carrying the load.
2) Forces are directed along angled components such as the roof to column joints, and column to flooring joints so that the forces hold pieces together instead of pulling them apart.
3) Structure is strengthened by using appropriate steel angles and connections.
4) Back bracing is added to increase lateral and vertical rigidity.
Load is uniformly distributed
on both sides of the shelter
STATIC LOAD
DYNAMIC
LOAD
BASIC TIMBER JOINT
JOIST FRAMING
BRACING
WELDING DETAILS
STEEL PLATES
L-BRACKETS
• http://www.world-architects.com/en/projects/41967_Tamedia_Office_Building
• https://www.pinterest.com/konsiteo/timber-structures/
• http://www.minimalisti.com/architecture/06/pallet-house-plans-design-ideas.html
• http://www.archdaily.com/257002/shelter-rainforest-marra-yeh-architects/
For this assignment, we were assigned to construct a temporary bus shelter (4 X 2 X 3
meters) showing our understanding of the skeletal structure in and applying the
usage of recyclable materials relating to its function. The construction should
demonstrate the knowledge of skeletal frames and its joints. It must clearly define all
building components such as roof, column, walls and floor. The joints should be
constructed to reflect actual joints. The real scale of the shelter is 4 x 2 x 3 meters,
and the model is to be constructed in 1:5 scale.
By the end of this project, we have understood the manipulation of skeletal
construction to analyze the issues of strength, stiffness and stability of structures
including modes of structural systems, forces, stress and strain and laws of static of
skeletal structures. We have also learnt how to overcome the force and stress applied
to a structure with suitable construction techniques.