Criterion B design

#1 gate

This gate will not drag on the ground. The big gate will have a 2 doors each door will have 3 big string hinges. There will also be 2 wires to hold the gate. The wires are hanged from the gate post. Wires help to not drag on the ground. The small gate for people will have 3 big strong hinges. The gate will be made of two Sheets of iron and Styrofoam. The Styrofoam will be between two sheets of iron. The sheets of iron will help the gate to be stronger. The Styrofoam makes the gate thicker and stronger. Styrofoam is light so it will not affect much to weight of the gate. If the gate’s weight is light, it will easy to open and easy to hold not drag on the ground.

Gate will never dragged on ground because of wires. But someone cut the wire, the gate will dragged on the ground but the wire is hard to cut, so it will not dragged on the ground.

#2 gate

This gate will not drag on the ground. The big gate will have a 2 doors each door will have 3 big string hinges. There will also 1 wheel for each door. The wheels help to not drag on the ground. The small gate for people will have 3 big strong hinges. The gate will be made of two Sheets of iron and Styrofoam. The Styrofoam will be between two sheets of iron. The sheets of iron will help the gate to be stronger. The Styrofoam makes the gate thicker and stronger. Styrofoam is light so it will not affect much to weight of the gate. If the gate’s weight is light, it will easy to open and easy to hold not drag on the ground.

Gate will never dragged on ground because of wheel, but rocks and rough land make the gate little hard to open it. It has the door ball.

#3 gate

This gate will not drag on the ground. The big gate will have a door with 4 little wheels. The big gate is sliding gate. It has a 10m long rail. Rail and wheels help to not dragged on the ground.

Sliding door can save the dead space, but it need long space to build the rail. If the gate size is 5m long, the rail size will be 10m long. So it’s hard to build the rail. And small rocks and sand will make the little hard to open.

Final Gate

I will compare with #1 and #2 gate. I will get the bell form the #2 gate and make the ball on #1 gate. The gate will not drag on the ground, it’s easy to open the gate, the gate is strong enough to not break easily and the bell will easy to find. Its cost will not very expensive.