12/6/12

This morning we went back over Trigonometry and Pythagoras in regards to the Roofing and trusses.We went up stairs and started with the session.SOH CAH TOA was shown to us,this is used to find angles,and sides in a triangle,and a2+b2=c2 is used for finding a missing side.These formulaes are highly accurate and useful on a building site.A lot of time is saved using these methods.They are Plain and simple,easy to remember.SOH CAH TOA are drawn up into 3 triangles to make it super easy to find out which one to use for what ever problem that may occur.

Purlins being nailed off and checked for straightness.

Once we had gone over the mathematical side of things we then moved on with the build down stairs.We had to then calculate the amount of rows of purlins needed for the roof.We set up the first row down the end of the trusses,at the top end we measured 150mm down,then got the inside to inside measurement of the length of the trusses and divided it by 815mm,the overall measurement was 3605mm in length.We lended up with 6 rows of purlins,We also cut the hip purlins to the right angle and since they were short,we cut them over a trusse so they can be joined over something sturdy.Most of them have been installed to place.Two 4 inche nails were used to nail them down at the top and bottom.A purlin screw is to be put in the middle.

Purlins.

Soffits will then be installed once we have everything else sorted.

27/3/12

This morning we all gathered around the whiteboard and learned what we were going to be doing for the day,We were going to be setting up Building Profiles.This task included using pegs,nails,hammers,spirit levels,tripods,builders levels,sopworth staffs,stringline,30 metre tape line,builders tapes and mauls.

We all loaded up into the Vans and traveled back to the river once again.


First off,we needed to establish our boundary lines for the section of the house build,2 pegs are driven into the ground to represent the corners of the boundary,a string line is then attached.A third and fourth peg can then be added,along with more string.Once this is completed,we were then able to find where the first peg will be driven into the ground for the first corner of the house.

Once we had got there we got into groups and mauled in our first peg.Once we had our first peg in we measured 7200mm then placed our second peg into the ground.From the second peg we measured 15500mm then place our third peg,then 7200mm for our third peg.

Which left the last measurement of 15500mm from the third back to the first peg.Once we had got our pegs into the ground we did the 345 to get a 90 degree then did some pythagoras,15.5m square x 7.2m square = 17.091 which is the measurement we used for our hypotenuse/diagonal.After that Mark put a line on one of the pegs,That line represented our FFL-Finished Floor Level.
We then did the profiles on the outsides of the pegs.After we had them pegged down,we used the builders level and staff to transfer the heights to each corner peg and from then we were able to set the boards,A spirit level was then used to copy the FFL line to the corner pegs for the profile boards,a quick and easy step.then we attached the stringline and got it all even and square.We rechecked our diagonals and parallels and we were out by a 30 mm so we had to do a few adjustments,in the end we got there and completed the task.