At eaves the bottom purlin is often stiffer than the upper one causing water ponding.
Glazing slope roof.
Aluminium roof glazing bars.
Figure 10 sloped glazing built in 1980 s investigated after collapse.
Other considerations for roof pitch and specification.
The sloped glazing system is designed to withstand uniform gravity loads such as dead load wind load and snow load as well as concentrated live and impact loads and transfer them to the structure.
Here are a few more things to think about in relation to roof pitch and specifying skylights.
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Sloped glazing vertical rafter detail at transition to steep roof detail 3 4 3 dwg dwf pdf the detail shows a skylight rake detail within a steep roof assembly.
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Sloped glazing is a system of exterior cladding which is attached to the main force resisting system structure of a building roof or sloped façade and usually supported by an elevated curb.
Deflection there is a level of flex that will occur in all glazing and it can be particularly apparent in overhead installations.
Figure 12 coordination of slope with deflections.
Framing supporting sloped glazing and skylights shall be designed to resist the tributary roof loads in chapter 16.
A metal counterflashing for the step flashing that forms the transition from the roof to the rafter is integrated into the pressure bar detail.
Wind loads snow loads and the weight of the glass itself.