28/03/2012

week 3  site set out

durung this week we iv learnt to use a builders level correctly and accurtaly starting from settin out the tripod to leveling the dumpy.
step 1: extend the legs out an try to get the top of it as flat as possible.
step 2: carefully place the dumpy on top of the tripod an screw the hold into the botttom of the dumpy. make sure that the leveling screws are ontop of each leg to the tri pod.
step 3: level the dumpy using the the screws around the bottom of it until the bubble is on the middle of the brown ring in the sight.
We also learnt how to set out profiles an string lines. we started by hammering in 1 peg and using the 30m tape to measure out the distance of our house legth an width. we set out profiles using hammers pencils sledgy builders level an staff. after setting out our profiles we measured out our width an length and made sure the lines were parallel to each other at both ends then moved the strings on each profile untill the house was a perfect rectangle. to get it perfectly square we had to measure the diagonalis on the house. from each corner to each corner. once both of the diagonals were the same u then ercheck the parrells an if they stil are the same you get a prefectly square rectangle. we made sure that all pegs were nailed in plumb an level. profiles had to be between 900mm an 1100mm away from the finished florr level peg 900m in from the profiles. once all the pegs were plumb an level every peg had to be braced. once we had the strings up we used pythagours theroy to check the corners for square. eg the 3m 4m 5m method.

we also learnt how to use a water level. we laernt that water is more accurate than your every day builders level and it can be used to level things around corners. it works when u make ur level mark on one side an then fill the hose.tube with water. draw a line on the tube at the height of your level line. then lower the other end on the tube untill the water level is exactly on your 1st level line. once it is u can mark the other end of the tube at the height of where the water level is in the tube and that will be the exact same height as your 1st mark. i.e level. things that can cause the level to be inaccurate are bubbles in the tube, a hole in the tube.




today we stayed at ucol we set out our bottom plates on the floor after squaring 1 end with the radial arm saw an lining it up with cams chalk line. we had 2 people standing on the 45x90 while another class mate drill a hole though the wood into the concrete with a dynadrill 12mm drill bit. after that put a bolt in the hole and used the rattle gun the screw it in. bolts were spaced at around 1200mm apart. we marked out the spacing for the piles at 2195mm apart from inside to outside meaning inside of the wood to outside of the next peice. we then used the dumpy an staff on each spacing where the piles would have sit we measured how hig the piless were going to need to be. thats where the class got upto for today