In article .com,
nazn wrote:
I just assumed the house walls would be straight and hence my plan to
build at 90 degrees, what is a 345 triangle?, I expect this is 3 pieces
of timber I would lash up to make the triangle to put against the house
walls??

Education these days!! ;-((

Take a length of string and make knots in it at regular intervals of say
approx every yard. The exact measurement doesn't matter as long as the gap
between every knot is the same.

Distance from one knot to the next is a length. You will need 13 knots making
12 lengths. Put the first knot by the house at the centre point. Line the
first three lengths along the wall and get someone to hold the first knot and
the fourth knot by the wall. Give the person holding the first knot the line
with the last knot and tell them to hold the two together. Measure out 4
lengths out from the centre of the house (other end of the string) and you
will find that the triangle of string will be taut when the 4 lengths are at
right angles to the wall. Mark where the knot at the end of those 4 lengths
lands. Do exactly the same but this time measuring the three lengths in the
opposite direction from the centre. If your measurements are right the new
marked point should be the same as the first - if it's slightly out take the
average. Mark a line going through that point.

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John Cartmell john@ followed by finnybank.com 0845 006 8822
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