Box Gutter Fall Calculator

Use a string level to ensure the string is completely parallel to the ground.

Box gutter fall calculator.

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. 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. For the conversion calculator enter in one box and the answer will appear in the relevant other.

This effectively states that all box gutters must allow for 30mm of freeboard which is from the overflow point eg. Calculate the gutter slope by dividing the length of the gutter needed by 10. This calculator has been created and designed for excel 2013 for windows. 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. 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. Measure the length of the string to determine the distance between the two points. Our online tools have been designed with simplicity in mind removing the need for any prior specialist industry knowledge.

Upon completion a full set of rainwater drainage design calculations are provided confirming the. Enter the x in the conversion calculator to get degrees. Comparing floplast gutter flow rates. 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.

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. I fall or slope box gutters to be installed with a minimum uniform fall of 1 in 200 towards the outlet. The tools guide the user step by step allowing fast and simple roof drainage design whilst ensuring full compliance with bs en12056 3 rainwater drainage design standard. The numbers on the left hand side of the table show the flow rates when the gutter is fixed level no fall and the figures on the right detail the flow rate when the gutter is fixed to a fall of 1 in 350.

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. If there is any doubt regarding the rainfall intensity for a particular area refer to the relevant council shire for accurate rainfall intensity figures. The gutter flow rate chart below compares the specific flow rates for each floplast gutter system. Box gutter with rain water head at end of box gutter.