Trim - Roof Laps

(Revised: 07/31/19)

SSR:

Purlin Upper Panel Adjust = -7" Lower Panel Adjust = +11"

Bar Joist Upper Panel Adjust = -7" Lower Panel Adjust = +11"

WideBay Upper Panel Adjust = -7" Lower Panel Adjust = +11"

SLR:

Purlin Notch with Punch Upper Panel Adjust = -3/16" Lower Panel Adjust = +6 3/16"

Bar Joist Not Defined by PE Notch with Punch Upper Panel Adjust = -3/16" Lower Panel Adjust = +6 3/16"

Purlins or Bar Joist (West Coast Lap) Square (Field Notch) Upper Panel Adjust = -5" Lower Panel Adjust = +10"

Panel Rib Roofs:

Purlin

Upper Panel Adjust = 0"

Lower Panel Adjust = +4"

Staggered Lap (SSR & SLR):

When the maximum panel length is exceeded, a staggered panel lap is required:

The laps should be locate using the longest default panels possible from the Low Eave

The shortest panels near the High Eave or Ridge should span a minimum of 3 secondary members

Locate all laps at secondary members that are continuous from BL to BL (Rake)

The maximum stagger = 5’-0”

Attempt to avoid staggered laps that straddle inside corners at an “L” shape building.

The 1^st Panel in the set at the Low Eave is Long

The 1^st Panel in the set at the Ridge / High Eave is Short

Any Panels at Intermediate sets are detailed the same lengths but staggered.

Standard Lap (Panel Rib):

When the maximum panel length is exceeded, a panel lap is required:

The laps should be locate using the longest default panels possible from the Low Eave

The shortest panels near the High Eave or Ridge should span a minimum of 3 secondary members

Locate all laps at secondary members that are continuous from BL to BL (Rake)