Box Gutter Fall Calculator

Measure the length of the string to determine the distance between the two points.

Box gutter fall calculator.

Comparing floplast gutter flow rates. 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. For the conversion calculator enter in one box and the answer will appear in the relevant other. The gutter flow rate chart below compares the specific flow rates for each floplast gutter system.

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. Use a string level to ensure the string is completely parallel to the ground. 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. Enter the x in the conversion calculator to get degrees.

This calculator has been created and designed for excel 2013 for windows. 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. 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. Place the line spirit level on the string.

This effectively states that all box gutters must allow for 30mm of freeboard which is from the overflow point eg. Box gutter with rain water head at end of box gutter. 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. Upon completion a full set of rainwater drainage design calculations are provided confirming the.

Our online tools have been designed with simplicity in mind removing the need for any prior specialist industry knowledge. Degrees must be used for the roof slope box. 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. Rainhead overflow or specific box gutter overflow must be at least 30mm below the height of the back of the box gutter.

Calculate the gutter slope by dividing the length of the gutter needed by 10. 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. If there is any doubt regarding the rainfall intensity for a particular area refer to the relevant council shire for accurate rainfall intensity figures. 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.