The daily and seasonal thermal cycling causes metal gutter linings to expand and contract and if expansion joints are not provided this movement will cause the metal to crack and so the gutter to leak.
Box gutter expansion joint detail.
Clearance for downspouts through the wood framing is a minimum 1 2 all around.
It replaces the need to box the end of two adjoining gutters and also the need to form a bridge to span the boxed ends.
T pren was developed over 25 years ago in europe to overcome expansion problems in metal gutters.
Adjacent sheets are joined by 1 lapped riveted and soldered seams.
8 commercial box gutter expansion joint in kynar 500 steel use an expansion joint every 40 50 lineal feet.
Allows proper thermal expansion of box gutter.
Required gutter slope 1 40 to 1 200 there is always some confusion as to how the slope affects the overall depth.
If an expansion joint must be accommodated at the corner itself it should be constructed as shown in detail 10 3b.
Fabricated from 24 gauge kynar steel.
Maximum allowable length between expansion joints with one end fixed.
The details shown are for the lining of a wood box gutter frame.
The biggest benefit other than ease of installation is that in the case of a blocked downpipe any water can flow across to the adjoining gutter eliminating flooding.
The internal gutter straps are easy to install and provide a clean exterior.
Gutters downspouts the greatest value in gutters and roof drainage with a unique design that improves performance while complementing your roof s aesthetic qualities metal era s line of water drainage products is the only system that s factory mutual approved.
Therefore any slope on the gutter will make the downstream end deeper or the flashing longer.
Expansion joint galv 24g 8 box kynar finish.
Hung gutters are formed from 8 0 to 10 0 long sheets of 20 oz.
Includes slip plate two internal end cap and cover plate.
Available in a wide variety of materials gauges and colors the gutter is supplied in standard 12 0 lengths and custom lengths up to 40 0 to minimize joints.
The depth shown in the calculations is at the upstream end.
The expansion strip joint has been designed to install as an expansion joint for industrial box gutters.
Expansion joint spacing depends on gutter configuration and material thickness see table 10b at inside or outside corners expansion joints should be provided not more than 24 from the corner.
Expansion allowances gutter specific expansion tables based on girth profile metal predicted annual δt expansion of building materials table with various expansion coefficients must be used for fascia and copings with consideration of both metal and substrate flat seam roof expansion guidance over 30 feet use batten seam design to allow for expansion.
An invaluable inspection resource for owners of standing seam batten seam or bermuda type roofs.
