Journal week 8

WEEK 8: WORKSHOP The task was to build a structure to withstand a large amount of direct force using only set number of materials.

We had a few design options.

Making our structure

Our groups materials were three 35x1200mm pine And one 5x1000mm plyboard

The preferred option was the second design as we though it would be the quickest and easiest to construct under our short time frame.

It also will have good strength against compression.

We tools we used were: Hand saw Electric drill Right angle ruler Hammer

WEEK 8 Workshop

Structural performance and failure mechanism

Our structure went first. We achieved 48cm of deflection and 605kg of force before our structure failed.

The main points of failure were: • Nails pulling out of plywood • Plywood warping due to tension and compression • Screw holes creating points of weakness in the timer.

WEEK 8 Workshop

Group 2: Had an interesting design with angled pieces of timber working as a brace, however their structure only withheld 27kg of force before it failed.

WEEK 8 Workshop

Group 3: They created a very simple design.

Their first attempt reached a load of 380kg and a deflection of 20mm. Their first trial was keeping the structure vertical.

The second attempt, the timber was already weakened but this time the timber was placed flat.

The timber was pushed to 40mm deflection and 200kg of force before it failed causing the timber to split in half.

Description/definition of key concepts Span: The full extent of something from one end to another.

Cross section: A surface or shape that would be exposed by cutting it straight in half.

Strength: the capacity of an object or substance to withstand great force or pressure Compression: The reduction of volume causing an increase in pressure apply to the object.

Tension: a strained state or condition resulting from forces acting in opposition to each other.

Flexion: the action of bending or the condition of being bent.

Shear: break off or cause to break off, owing to a structural strain.

Deflection: the amount in which an object moves from its original form.

Buckling: bend and give way under pressure or strain

WEEK 8: IN DETAIL COLORBOND KLIPLOCK ROOF DECK

My detail section is the Parapet section detail found on drawing A07.01.

COLORBOND CAPPING AND FLASHING

It is located at the new entrance to the MSLE building. It is the roof and guttering detail for the first floor.

COLORBOND CLADDING OVER FURRING CHANNELS ROOF FRAMING TO ENGINEER'S DETAILS

100x100 SHS 40 X 40 PURPOSE MADE FOLDED COLORBOND BASE TRIM TO CLADDING/WINDOW FRAME JUNCTION CAPRAL 400 SERIES WINDOW HEAD P50 SHADOWLINE 13MM FLUSH JOINTED PLASTERBOARD CEILING LINING

PARAPET SECTION DETAIL

1:5

STOPPING BEAD AT WINDOW / PLASTERBOARD JUNCTION

B

CAPRAL 400 SERIES WINDOW FRAMING

The detail consists of materials such as: • colourbond Kliplock roof deck • colourbond capping and flashing • colourbond cladding overfurring channels • 40x40 purpose made colourbond base trim • carpral 400 series window head

FLUSH JOINTED PLASTERBOARD FIXED TO BATTENS 150X100 RHS

COLORBOND ROOF FLASHING AS SPECIFIED TO EXISTING ROOF WITH UPTURN UNDER WINDOW FRAME

SILL DETAIL NEW LFR L1

1:5

SFL

WEEK 8 In Detail

3.175

EXISTING CONCRETE