Rev: 11.11.21 Page 14 CCD-0004203
Upper Deck Main
Accepted Upper Deck RV Engineering Guidelines Rev: (3/1/2021)
* Laminated side wall guidelines only; for stick and tin or hung glass, please inquire with chassis
engineering.
14.1 Upper Deck Main Rail rating specifications
GVWR 0-1 UD Slides 2 UD Slides (front living)
≤10,000 LBS 2X5 - 11GA 2X5 - 7GA or 2x6 11GA
10,001 - 12,000 LBS 2X6 - 11GA 2X6-7GA or 6" 8.2lb Structural XMC
12,001 - 15,501 LBS 2X6 - 7GA or 6" 8.2lb Structural XMC 2X6-1/4GA or 6" 8.2lb Structural
XMC
15,501 - 18,000 LBS 2X6 - 1/4GA or 6" 8.2lb Structural XMC Double 2X6 mains - 7/11GA, 4x6
1/4ga, 2X8 - 11GA
18,001 - 21,000 LBS Double 2X6 mains - 7/11GA, 4x6 1/4ga,
2X8 - 11GA
2X8 - 7GA
>21,001 LBS 2X8 - 7GA 2X8 - 1/4GA
14.2 Upper Deck wall attachment requirements
# of Horizontal Attachment Points Stick & Tin Laminate
BETWEEN FRONT AND REAR HEADERS 1 1
BETWEEN REAR HEADER AND FRONT RISER 3 3
BETWEEN FRONT AND REAR RISERS 1 -
14.3 Upper Deck Main NOTES
* A laminated front shear wall is recommended for all applications.
* All 6" 8.2lb structural XMC mains only to be used in conjunction with square single header design.
* If using double mains, the inside main must have a 1.5" diam clearance lag hole.
14.4 Upper Deck Headers
GVWR Double Header** Single Header
≤10,000 LBS 2X5 11GA w/ shear wall or 2X5 7GA, 2X6
11GA
6X6 7GA
10,001 - 12,000 LBS 2X6 11GA 6X6 7GA
12,001 - 15,500 LBS 2X6 7GA 6X6 1/4GA
15,501 - 18,000 LBS 2X6 7GA or 2x8 7GA 6X6 1/4GA or 6X8 1/4GA
18,001 - 21,000 LBS 2X6 1/4GA or 2x8 7GA 6X6 1/4GA or 6X8 1/4GA
>21,001 LBS 2x8 7GA N/A
* Header supports should be one tube height shorter than the headers and should be 11ga.
* Keep header support tubes out of the radius in a radius front header UD.
* All 2x8 upper decks require 2x2 11ga tubes above pin box side plates where applicable.
** Radius/Miter headers need to go up one gauge/size.
Note: No holes in top or bottom of single header tube.
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