Box Gutter Fall Calculator

Calculate the gutter slope by dividing the length of the gutter needed by 10.

Box gutter fall calculator. Box gutter with rain water head at end of box gutter. If the length of the gutter is 10 5 metres 35 feet the amount of slope required is 1 25 cm 1 4 inch multiplied by 1 metres 3 5 feet which when rounded up is 2 5 cm 1 inch. If there is any doubt regarding the rainfall intensity for a particular area refer to the relevant council shire for accurate rainfall intensity figures. For the conversion calculator enter in one box and the answer will appear in the relevant other.

Measure the length of the string to determine the distance between the two points. It is a ms excel file and uses data contained in ncc volume two for the calculations. Based on the location roof design and overflow types the calculator provides the allowable gutter types downpipe sizes and whether the selected overflow measures are adequate. Rainhead overflow or specific box gutter overflow must be at least 30mm below the height of the back of the box gutter.

Design area effective area 5 x 10 x 1 29 64 5m run off 64 5m x 0 022 l s per m 1 42 l s from chart 125 x 100 gutter with 76 ø downpipe appears suitable but check. Use a string level to ensure the string is completely parallel to the ground. Degrees must be used for the roof slope box. The gutter flow rate chart below compares the specific flow rates for each floplast gutter system.

I fall or slope box gutters to be installed with a minimum uniform fall of 1 in 200 towards the outlet. Enter the x in the conversion calculator to get degrees. Place the line spirit level on the string. Lg 10 133 therefore reduction factor 0 86 d 0 1 gutter capacity x reduction factor 2 84 x 0 86 2 44 l s therefore the proposed system is suitable.

This effectively states that all box gutters must allow for 30mm of freeboard which is from the overflow point eg. To calculate gutter slope attach one end of a long piece of string to the highest point of your gutter and the other end at the location of your downspout. Comparing floplast gutter flow rates. Our online tools have been designed with simplicity in mind removing the need for any prior specialist industry knowledge.

Internal gutters box gutters 100 years ari table e1 in as nzs 3500 3 lists latitude and longitude of selected places some of which are marked on the maps. Take the plan length from ridge to gutter divide by the total fall this will give the x in terms of the roof slope being 1 in x. Simplified suitable for flattish roofs with little or no vertical faces or steep roofs draining to one side of box gutter only or any roof if you are in a hurry and make the necessary allowances for all catchments. Upon completion a full set of rainwater drainage design calculations are provided confirming the.