Reply
 
Thread Tools Display Modes
 
Old 03-31-2018, 03:29 PM   #1
Mini-Skoolie
 
Join Date: Apr 2017
Location: Oakland
Posts: 22
Year: 2001
Coachwork: International
Engine: DT 466E
Rated Cap: 72 kidds
Roof Deck Design

Greetings everyone. Good weather is here, and build season is upon us again. On my shortlist is a roof deck for grilling and sunset enjoyment.
I've seen many busses that use bolted on square tubing through the ribs. I don't really like this design, as it places all the weight on the bolts in shear. Obviously, it works, but does anyone have alternative ideas?
Currently thinking of welding angled supports at the bottom of the tube to the frame rail, but something in my head says welding to those might be...difficult. And a poor idea.
Rsquared is offline   Reply With Quote
Old 03-31-2018, 05:33 PM   #2
Skoolie
 
Join Date: Feb 2016
Location: Indianapolis, IN
Posts: 128
Year: 1999
Coachwork: AmTran
Chassis: International FE
Engine: DT466E
Rated Cap: 84 passengers
Your frame rails are more than likely heat treated so I personally would avoid welding anything directly to them unless you're an experienced welder. You could weld your supports to a plate and drill 4 holes in the web of the rail and bolt the plates to your frame rails.
rensch26 is offline   Reply With Quote
Old 03-31-2018, 09:08 PM   #3
Bus Crazy
 
ol trunt's Avatar
 
Join Date: Apr 2012
Location: So Cal
Posts: 2,169
Year: 1935
Coachwork: Superior
Chassis: Chevy
Engine: 317 ci/tid / Isuzu
"Your frame rails are more than likely heat treated so I personally would avoid welding anything directly to them unless you're an experienced welder. You could weld your supports to a plate and drill 4 holes in the web of the rail and bolt the plates to your frame rails."

Absolutely the best way to go if you feel you need to go all the way to the frame. I'd probably just go with tubing welded to plates attached to the roof bows. Unless you plan to tote an Abrams tank up there or sumpin? Jack
ol trunt is offline   Reply With Quote
Old 03-31-2018, 09:24 PM   #4
Bus Nut
 
Thomas1985's Avatar
 
Join Date: Sep 2016
Location: Fayetteville Arkansas
Posts: 415
Year: 1991
Coachwork: Carpenter
Chassis: GMC G3500 Vandura
Engine: V-8 5.7L Gas
What he said.
__________________
- Thomas

The Daily Driver Bus Build
Thomas1985 is offline   Reply With Quote
Old 03-31-2018, 09:58 PM   #5
Bus Geek
 
o1marc's Avatar
 
Join Date: Dec 2017
Location: Dawsonville, Ga.
Posts: 3,488
Year: 1999
Coachwork: Genesis
Chassis: International
Engine: DT466/3060
Rated Cap: 77
A 3/8" grade 8 shoulder bolt has a shear strength of 830lbs. if you used 8 ribs and 2 bolts per rib you are looking at total shear load of 26,560lbs.
Now how big of deck were you planning on?
o1marc is offline   Reply With Quote
Old 03-31-2018, 10:14 PM   #6
Bus Nut
 
Join Date: Feb 2018
Location: Pendleton Indiana
Posts: 258
Year: 2010
Coachwork: IC
Engine: MF DT466
Rated Cap: 81
Quote:
Originally Posted by o1marc View Post
A 3/8" grade 8 shoulder bolt has a shear strength of 830lbs. if you used 8 ribs and 2 bolts per rib you are looking at total shear load of 26,560lbs.
Now how big of deck were you planning on?
what he said. If you max that weight out you better take turns real slow.
Miles O Roads is offline   Reply With Quote
Old 03-31-2018, 10:32 PM   #7
Mini-Skoolie
 
Join Date: Apr 2017
Location: Oakland
Posts: 22
Year: 2001
Coachwork: International
Engine: DT 466E
Rated Cap: 72 kidds
Not planning on keeping it too loaded during transit, but I have been known to play with some large steel sculpture now and then. Final plans include some sort of jib crane up there, capable of handling this lady. Or 20+ hippies jumping in unison. Impact loading is a bitch.
https://m.facebook.com/ColossalSkeletalMarionette
Rsquared is offline   Reply With Quote
Old 03-31-2018, 10:46 PM   #8
Skoolie
 
Join Date: Dec 2017
Location: southern maine
Posts: 107
Year: 2010
Coachwork: Coach & Equipment MFG
Chassis: ford E350 superduty
Engine: 5.4 liter v8
Rated Cap: 7 passenger
I would go with the bolts,.. and a couple of short 1/2" or so welds (not enough to ruin your heat treat if done an 1/2 inch at a time and let cool between welds) or multiple small spots (depending on the geometry of roof rack support and roof rib intersection) welds are like 1200 pounds per linear inch and will take shock loads better than bolts over time

but im a belt and suspenders sort of guy
__________________
2010 ford e350 superduty v8 7 passenger bus
pbeggs is offline   Reply With Quote
Old 04-01-2018, 12:01 AM   #9
Bus Geek
 
Join Date: Sep 2017
Location: Owasso, OK
Posts: 2,627
Year: 1999
Coachwork: Thomas
Chassis: Saf-T-Liner MVP ER
Engine: Cummins 6CTA8.3 Mechanical MD3060
Rated Cap: 46 Coach Seats, 40 foot
I don't know about the others, but Thomas specifically says do not weld to the frame. They may just be playing cya, but I'd use bolts.
__________________
Steve Bracken

Build Thread
Twigg is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:36 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.