How To Frame Exterior Walls On A Platform Frame 4

Squaring, Bracing And Raising Walls

If the wall is to be sheathed while it is on the floor, it should be moved to the chalkline and the bottom plate toenailed with double headed nails. Square the wall by measuring the diagonals. Two tape measures can be used. If the wall is very large, the 3-4-5 method can be used with two tape measures to square the wall. The larger the 3-4-5 triangle, the more accurate the results will be. Once the diagonals are equal and the wall is squared, toenail the top plate to the floor and sheath the wall. A let in diagonal brace can be used to keep the wall square also. Once the wall is sheathed, remove the toenails, raise the wall, plumb and brace it.

Using The 3-4-5 Method To Find A Right Angle To A Wall

The 3-4-5 method can also be used to find a right angle to a wall as shown in figure 30. The 3-4-5 method is based on the Pythagorean Theorem. By placing tape measures along sides 4 and 5 on the right triangle in figure 30, and keeping the tape measures and wall segment in a 3-4-5 proportion, a right angle to the wall can be determined. For Example, a right angle can be found if the wall segment holding the tape measures is 3 metres and the two tape measures are 4 and 5 metres respectively. Longer wall segment and tape measure lengths will have smaller measurement errors.

Figure 30                 Measuring A Wall Right Angle With The 3-4-5 Method

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1.Frame Exterior Walls: Layout The Top & Bottom Wall Plates.
2.Frame Exterior Walls: Frame The Wall & Wall Openings.
3.Frame Exterior Walls: Leave Wall Corner Spaces For Top Plates To Overlap.
4.Frame Exterior Walls: Square, Brace & Raise The Wall.
5.Frame Exterior Walls: Walls Can Be Squared & Straightened After Raising.

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Written and maintained by
Ronald Hunter

All images and text are copyright Ronald Hunter 2005 to 2011