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.
Internal gutter fixings.
Internal gutters also known as box gutters are seen as an easy solution to the collection and disposal of roof water.
Pvc rain gutter is more cost effective when compared to metal and is easier to install than metal.
Use a pencil to mark the positioning of the outlet and its fixing holes onto the fascia ensuring that it is no more than 50mm below the level of the roof.
When choosing what type of gutter you want consider material initially.
Box gutter 2 1 fixing sealing the box gutter 4 2 2 joining the box gutter 5 3.
Figure 2 membrane roof and gutter design.
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.
Cut gutter ends at 45 as shown.
E2 as1 8 1 6 1 requires all internal gutters to have a minimum 1 100 slope.
Fix external and internal corner over mitred cuts use rivets or screws and silicone.
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.
Rafters 4 1 ridge radius end rafters 8 9 4 2 jack rafter connection 9 4 3 gable end rafter 10 4 4 standard valley rafter 10 4 5 drop valley rafter 11.
This bulletin outlines the requirements of e1 as1 and e2 as1 and gives design parameters to minimise the risk.
Figure 4 overflow located below any potential overflow into building from e2 as1.
Eaves beam 3 1 fixing the eaves beams 6 3 2 fixing the gable support platform 6 3 3 joining the eaves beam 7 4.
135 degree gutter angle internal system plus in black part of the universal plus rainwater system 128mm x 88mm designed to aesthetically complement any property the universal plus system is ideal for use on larger residential buildings smaller commercial premises and conservatory roof applications as the system is sturdier due to the thick gutter extrusion.
Cut the gutter ends at 45 as shown.
To make internal gutters as safe and durable.
To establish the position of the running outlet or stopend outlet hang a plumb bob from the fascia so that it hangs directly over the drain.
E2 as1 specifies no end laps for membrane lined internal gutters and that metal gutter laps are welded.
They are installed internally at a maximum of 1 2 metre intervals and are not visible on the external face of the gutter.
Assemble in a similar manner to external corners.
Internal gutter straps hold the face of the quad guttering into position.
Internal gutters must be continuously supported on timber boards treated to h1 2 or on ply treated to h3.
Reduce the top rib for 25mm to allow for a slip joint.
