1 their major function today aside from confusing architects is to protect the edge of roof assemblies from wind uplift forces.
Parapet height against sloped roof.
If a parapet wall is a minimum of 30 high and the height plus the width of the wall is a least 48 then it was determined that the fall hazard was removed and this was a compliant method to protect construction employees.
Wsrca suggests for walls 24 inches and taller that wall cladding be considered in lieu of membrane wall flashings per detail tp 8a.
Where the roof slopes toward a parapet at a slope greater than two units vertical in 12 units horizontal 16 7 percent slope the parapet shall extend to the same height as any portion of the roof within a fire separation distance where protection of wall openings is required but in no case shall the height be less than 30 inches 762 mm.
The profile of specific components their.
Roofing system assemblies where the roof covering membrane is installed to extend and wrap over parapet walls at the perimeter that are less than 30 inches 762 mm and down to the exterior side of the wall.
Low slope roofs with a pitch of less than 3 12 25 percent slope are considered sufficiently flat to provide a safe walking and working surface.
Smart to roof pitch no don t think so.
Section 705 11 1 of the ibc for parapet construction requires that parapet walls be not less than 30 inches.
I assume by parapet you mean your wall finishes above the roofline.
E slopes 0 12 through 5 12 multiple unit roof coverings.
Historically so many problems have occurred with parapets that we have a name for it.
306 5 1 of the imc addresses this situation.
Parapetitus they have a long history which of course is not always clear that allows me to embellish without threat of peer review reversal.
Equipment that is pulled by an operator who walks backwards shall not be used on a roof having a slope greater than 4 12.
A roof with a slope of 25 percent slope to 33 percent slope is fairly easy to walk across without toe holds or safety devices but these slopes require a level.
Employees shall be protected from falls from roofs that are of a height of more than 20 feet by the use of a roof jack system as provided in section 1724 a a.
We would like to show you a description here but the site won t allow us.
But edit profile of wall and attach to locked ref planes locked to top of roof will give you smart with height and width changes.