Internal Gutter Design

E2 as1 8 1 6 1 requires all internal gutters to have a minimum 1 100 slope.

Internal gutter design. Often the outlet to the valley gutter discharged over a small portion of roof before being contained by the eaves gutter figure 7. Learn more how to storm water design for building sites. Metallic coated steel is not recommended for internal gutters that are difficult to replace. Design for a 10 minute rainfall intensity for the location with a recommended minimum design intensity of 200 mm hour rainfall intensity is for a storm with a 10 probability of occurring annually.

Downpipe eaves gutter long straight eaves gutters box gutter to rain water head box gutter vertical faces box gutter side o flow box gutter vertical o flow storm water pipe size storm water network overland flow path spitter upstream end custom rain water head. Iko armourplan 0 6mm and1 2mm and sika trocal 0 8 and 1 2 mm application. Can be purchased for 13 50 from www branz co nz or call 0800 80 80 85. However significant inconvenience damage repair cost and health issues may occur if water from the gutter gets into the building structure and or the space below.

Lpcb certified to lps 1181 grade ext b non fragility performance. Figure 2 membrane roof and gutter design. Internal gutter construction gutter construction varied from a simple shallow trough or v like a valley detail to a tapered valley laid over firred framing to give a fall figures 5 and 6. Checked annually for any damage or deterioration to the gutter lining cleared to remove debris leaves etc.

In this detail a one piece copper gutter lining and apron is used in conjunction with a standing seam roof. This bulletin outlines the requirements of e1 as1 and e2 as1 and gives design parameters to minimise the risk. The upper edge of the gutter apron extends at least 6 onto the roof and is folded over and held by cleats at 12 o c. The design of gutter and downspout assemblies is an area of building design which demands special attention.

Internal gutters when internal gutters are difficult to replace and their failure could cause major disruption to the building below they must be made from materials that will last 50 years to comply with the nzbc. With the exception of membrane roofs water from internal gutters must discharge into a rainwater head or to an internal outlet as shown in e2 as1 figures 63 a and b and figures 64 b or c see figure 3. 2014 class b maximum 868mm boundary sole 700mm valley sole dimension. A continuous lock strip is soldered to the apron at least 4 below its upper edge.

Internal gutters also known as box gutters are seen as an easy solution to the collection and disposal of roof water. Available in lengths up to 8m fire rating. Boundary valley and valley hip lengths. Maintenance durability and longevity are important factors to consider when designing gutters and.

Ongoing maintenance of internal gutters is as essential as good design and. E2 as1 specifies no end laps for membrane lined internal gutters and that metal gutter laps are welded. Branz bulletin 556.