KARAMBA BAR

DropBox link to files

https://www.dropbox.com/sh/w7y13fo7fcyw6d6/AADNIj1OLrY3b5vElZegzLSIa?dl=0

WEEK 3

PLAYING CARDS VERTICAL STRUCTURE

Structure:
This project we were tasked to create the largest vertical structure we could using only a single deck of playing cards. We could also cut the cards and use string or paper clips to help aid  with design. I started making various mocks up which did not end up going well.

The first mock up consisted of sticking cards end to end with paper clips to form a very large arch but the structure got very wobbly and wasn't able to stand taller than 30 cm so i decided to scrap that idea.

The next mock up i decided to thread a single string through one end of a playing card, tying a knot and then threading it through the other end causing the the card to bend then knotting that end  off this caused tension in the string and continuing the process results in the string holding itself and the cards up as seen in the picture below

Unfortunately i didn't really know how to adapt it to  a structure so i ended up scraping this idea aswell.

The final design we ended up using was a interlocking  joint starting with  two cards for the base  placed horizontally and another  two on top in a criss cross structure. this continued vertically until we changed the direction of the cards so they stood vertically giving the structure an extra boost in height.

Testing:

the structure did stand up but as a whole it was not very structurally sound. The slightest  nudge would cause it to sway and tip and when it came to the wind test it didn't take much to topple the structure. Overall i think the structure could of been  better maybe have having a larger perimeter or a different  joining  method could of helped, perhaps using more cards to buttress the sides of the structure .

WEEK 2

Vertical Structures
This week the  goal was to create structures that would have to act as a base and withstand a vertical  load, because of this our structures we more layer focused , bottom heavy and upright  as to be able to withstand the downward force rather then stretched out like last  weeks structures.

STRUCTURE ONE

 

Materials used :
- Rubber bands
- Satay sticks.
Structure:
 the structure consists of numerous  beams constructed out of 5 satay sticks, bundled and tied together with rubber bands and then  layered on top of each other end to end in the shape of square.  Two diagonal satay beams intersect the middle of the structure. The goal was to to have the weight of the paper stacks spread evenly  through the structure and down towards the ground so as to not focus to much weight in a single area.

Testing:
We loaded 5 stacks of paper onto the structure (12.5 kg) and applied downward force ourselves  but because of the size and flexibility of the sticks it didn't really seem to fail because being  a grounded structure so close to the ground and having the weight evenly distributed,  the force wasn't  strong enough force to physically crack any of the sticks let alone cause the structure to fail.

STRUCTURE TWO

MATERIALS :
- Satay sticks
- Hot glue
Structure:
This structure was basically a reverse of the last one. Its a layered structure except now it is in the shape of a diamond and it intersects in the middle at right angles in stead of 45 degrees. Also the use of hot glue instead of rubber bands to secure it

Testing:
Had basically the same outcome as the first although we used 10 stacks of paper this time (25kg) but the structure did not fail.

STRUCTURE THREE

Materials:
-Paper
Structure:
Like last week in terms of construction the third structure differed greatly from the other two since we were limited to just paper. to create this structure paper was folded into a zig- zag shape acting as a support truss. To give the overall structure strength numerous pieces of paper were folded in on each other so there plenty of triangular support then to keep it all sturdy a large piece encased them all

Testing:
the structure was able to withstand 6 stacks of paper (15kg) as well as a student standing atop of it (roughly 65 -70kg) because of the nature of the structure we didn't really expect it to fail since it was such a solid mass and we were right since  the structure only seemed to compress on itself and not spill out everywhere.

Week 1

WEEK 1 STRUCTURES
STRUCTURE ONE:

 
The first bridge structure was created out satay sticks, Hot glue and rubber bands. After looking into structural support systems research showed the the triangle form has a lot of advantages over that of a square. because of its three sided form when a force is applied to a point it travels down the edges to the ground and stay ridged where as a square form would tend to bend and buckle. To ensure the horizontal structure was structurally sounds multiple satay sticks were used to form strut pieces therefore making it bulky and strong .

Testing:
This form was able to hold 9 loads of paper totalling 22.5kg kilos, Although not without visible buckling. From there further force was applied by pushing down on the structure and was able to resist for quite a bit until ultimately succumbing to failure.


STRUCTURE TWO:

The materials used  in this second structure include: Foam core, Satay sticks. Nylon fabric and rubber bands. With this structure we wanted to build of stuff learned in making the first one because of this we kept the focus on very triangular shapes with a cross beam truss  shape forming the base of the bridge structure that was held together with the use of rubber band. From there we rested a piece of form core over the top to help distribute the weight across the structure. Going forward we wanted to replicate a suspension type bridge but didn't succeed since... it wasn't a suspension bridge rather just looked like one we formed a triangular support system on either side out of satay sticks, forcing through the  foam core and attaching it to the satay sticks that formed the base. We ended up just using the nylon to secure everything rather then to suspend anything.

Testing:
Out not suspension bridge faired quite well despite its title managing again to hold up 9 stacks of paper (22.5 kg) again needing physical intervention id say the structure managed to withstand around 50kg.


STRUCTURE THREE:

The next structure was entirely constructed out of paper (not including the foam core base). This structure  was the most unique out of the three since we took a much more different approach straying away from triangle and and trusses, instead focusing on reinforcing. The structure itself is quite simple consisting of folded up lengths of paper to make them ridged and encasing them all within a large piece to make the whole structure one solid piece.

TESTING:

We were not expecting to much from this bridge but to out surprise the structure was quite sturdy, withstanding 10 stack of paper (25 kg) and immense downward pressure from one of us. The structure in total to a load of about 60kg.