Flex TPO Для дома - Manual (Page 4)

4
FLEX TPO PLUS
MECHANICALLY ATTACHED ROOF SYSTEMS
PERIMETER SHEET REQUIREMENTS AND FASTENER GUIDE
Perimeter Sheets
Flex TPO mechanically attached roof systems require the installation of
½ (half) sheets (a sheet 4’ or 5’ wide) along the roof perimeter. The roof
perimeter is defined as the edges of each roof section. In situations that
involve multi-level roof areas that meet at a common wall, the adjacent
edge of the upper roof is treated as a roof perimeter if the height difference
is greater than 3 (three) feet. A perimeter sheet is not required at the base
of the wall.
The height of the building and the wind uplift pressure requirements of the
project are factored to determine the number of perimeter sheets to install.
A minimum of one perimeter sheet is required.
Sloped roof assemblies equal to or greater than a 2/12 slope require a
minimum of one perimeter sheet to be installed centered over the roof ridge.
Buildings that have canopies or overhangs or large openings in the walls re-
quire the additional installation of perimeter sheets in these areas. Contact
Flex Technical Services for assistance in determining the number
of perimeter sheets to install in these roof areas. 1-800-969-0108.
The following chart is provided to act as a general guide to assist in
calculating the perimeter sheets required for most installations. The project
specifications, Building Code requirements or Factory Mutual approval may
dictate fastener/plate placement options and the installation of additional
rows of perimeter sheets with enhanced membrane securement.
Wind Velocity Building Height Number of Perimeter
Sheets Required
) 100 mph ) 50’
50’ to 75’
1 or 2 *
2
100 to 129 mph ) 75’ 2 **
* 130 mph ) 75 4
* See important notes on Page 5