Shelf weight - Fiberglass RV


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-28-2012, 11:10 AM   #1
Senior Member
 
Sue and Henry's Avatar
 
Name: Sue and Greg
Trailer: 1982 Burro 13 foot and a 2015 Casita Spitit Deluxe 17 ft.
Washington
Posts: 575
Registry
I'm making a shelf over the front window of my 13 foot burro.

Click image for larger version

Name:	image-1839110245.jpg
Views:	28
Size:	75.0 KB
ID:	53166

This is what I have so far. There are three layers of cloth fiberglassed on the top and bottom of a 1/4" sheet of board (repurposed from an old waterbed base). The burro manual does not say what their shelf is made out of, but my plan is to fiberglass a front lip on and after finishing the surfaces, fiberglass it in place.

Click image for larger version

Name:	image-1732298765.jpg
Views:	29
Size:	52.5 KB
ID:	53167


Click image for larger version

Name:	image-256580532.jpg
Views:	29
Size:	82.6 KB
ID:	53169


Picking this up in its unfinished state, it seems too heavy. My scale tells me it is currently 14#. Add another pound for finishing glass.

I plan to store clothes, extra bedding, towels...on top. Not the heavy stuff. Does this seem reasonable? Should the wall be strong enough?
__________________

__________________
Sue and Henry is offline   Reply With Quote
Old 11-28-2012, 05:09 PM   #2
Senior Member
 
Thomas G.'s Avatar
 
Name: Kinga DeRode
Trailer: For Sale Or Rent
Rooms to Let 50 Cents
Posts: 5,103
I think that the walls are strong enough, but the shelf itself seems unnecessarily heavy. I'm also working on a set of similar shelves but I'm using 3/16" underlayment and extruded L shaped aluminum.

By giving a shelf "section" via an upturned portion you can gain a lot of strength with little weight. Sort of the way a piece of angle iron is much stronger than a a flat piece of steel of the same weight.
__________________

__________________
UHaul and Burro owners, join the UHaul Campers on Facebook. https://www.facebook.com/groups/529276933859491/
Thomas G. is offline   Reply With Quote
Old 11-28-2012, 05:24 PM   #3
Senior Member
 
honda03842's Avatar
 
Name: Norm and Ginny
Trailer: Scamp 16
Florida
Posts: 7,300
Cabinet weight

I made our rear cabinet out of a sheet of 1/4 inch birch plywood, probably using less than half a sheet. The rear cabinet holds 3 blankets, two sets of sheets, all our jeans and holds up our 19" TV. It is supported off the window frames.
Attached Thumbnails
Overhead done.jpg  
__________________
Norm and Ginny

2014 Honda Odyssey
1991 Scamp 16
honda03842 is offline   Reply With Quote
Old 11-28-2012, 05:27 PM   #4
Senior Member
 
Sue and Henry's Avatar
 
Name: Sue and Greg
Trailer: 1982 Burro 13 foot and a 2015 Casita Spitit Deluxe 17 ft.
Washington
Posts: 575
Registry
Quote:
Originally Posted by honda03842 View Post
I made our rear cabinet out of a sheet of 1/4 inch birch plywood, probably using less than half a sheet. The rear cabinet holds 3 blankets, two sets of sheets, all our jeans and holds up our 19" TV. It is supported off the window frames.
That is really attractive. I especially like that it is closed. I had planned open with a lip. Hum. Time to reconsider.
__________________
Sue and Henry is offline   Reply With Quote
Old 11-28-2012, 05:31 PM   #5
Senior Member
 
Thomas G.'s Avatar
 
Name: Kinga DeRode
Trailer: For Sale Or Rent
Rooms to Let 50 Cents
Posts: 5,103
Quote:
Originally Posted by honda03842 View Post
...... It is supported off the window frames.
My design also is supported off the rear window frame plus the side curtain attachment screws. Having a smooth interior like the Burro, I didn't want to do anything to the fiberglass that was permanent.
__________________
UHaul and Burro owners, join the UHaul Campers on Facebook. https://www.facebook.com/groups/529276933859491/
Thomas G. is offline   Reply With Quote
Old 11-28-2012, 05:32 PM   #6
Senior Member
 
Sue and Henry's Avatar
 
Name: Sue and Greg
Trailer: 1982 Burro 13 foot and a 2015 Casita Spitit Deluxe 17 ft.
Washington
Posts: 575
Registry
Quote:
Originally Posted by Thomas G. View Post
I think that the walls are strong enough, but the shelf itself seems unnecessarily heavy. I'm also working on a set of similar shelves but I'm using 3/16" underlayment and extruded L shaped aluminum.

By giving a shelf "section" via an upturned portion you can gain a lot of strength with little weight. Sort of the way a piece of angle iron is much stronger than a a flat piece of steel of the same weight.
By section, do you mean the shelf is divided up bridging the short crossways? What about that long 5 1/2 foot length? How are you keeping it from sagging?
__________________
Sue and Henry is offline   Reply With Quote
Old 11-28-2012, 05:36 PM   #7
Senior Member
 
Sue and Henry's Avatar
 
Name: Sue and Greg
Trailer: 1982 Burro 13 foot and a 2015 Casita Spitit Deluxe 17 ft.
Washington
Posts: 575
Registry
Quote:
Originally Posted by Thomas G. View Post

My design also is supported off the rear window frame plus the side curtain attachment screws. Having a smooth interior like the Burro, I didn't want to do anything to the fiberglass that was permanent.
I see. Sounds like a very good plan. Thanks Thomas.
__________________
Sue and Henry is offline   Reply With Quote
Old 11-28-2012, 05:50 PM   #8
Senior Member
 
honda03842's Avatar
 
Name: Norm and Ginny
Trailer: Scamp 16
Florida
Posts: 7,300
Back or Front Shelf

Sue my shelf is supported off the side and rear windows. It required no holes thru the shell of the trailer. Unfortunately the side windows and rear window are not at the same height so I had to add a piece of wood to the top of the side windows to support the sides of the shelf. I'm going to look for a picture for you.

I used three pieces of aluminum angle to support the shelf, one for each window. I drilled holes in the angle that aligned with the window's screw holes and used these screws to hold the angle. I painted the angle black to match the window frames.

I first made the bottom and then glued a 1 x 3 to the front edge of the bottom. Then added the verticals and a cross member between the verticals. The verticals are to strengthen the area around the openings. Finally I added the front all screwed and glued together. It's very strong. I believe I described it in Preparing a 1991 Scamp under Modifications.

Since I added a piece of wood to even out the window heights, I added small shelves on each side. Besides providing storage space for little things, It also prevents the shelf from moving forward.

After thought... I probably glued the verticals to the face piece before installing it.

If you want more detail let me know.

By the way the height of the front face maes a pretty strong section.
Attached Thumbnails
Rear Overhead 1.jpg   Rear Overhead 2.jpg  

Shelves.jpg  
__________________
Norm and Ginny

2014 Honda Odyssey
1991 Scamp 16
honda03842 is offline   Reply With Quote
Old 11-28-2012, 07:02 PM   #9
Senior Member
 
Thomas G.'s Avatar
 
Name: Kinga DeRode
Trailer: For Sale Or Rent
Rooms to Let 50 Cents
Posts: 5,103
Quote:
Originally Posted by Sue and Henry View Post
By section, do you mean the shelf is divided up bridging the short crossways? What about that long 5 1/2 foot length? How are you keeping it from sagging?
No, section is an engineering term referring to the cross sectional dimensions of the structural piece. By having a relatively tall aluminum lip on the front, my design gives the long front piece a lot of resistance to sagging. I found this extruded stuff at a recyclers, but one could use aluminum angle from a place like Home Depot or Lowes. In Norm's design the front to the cabinet provides section to resist sagging..
__________________
UHaul and Burro owners, join the UHaul Campers on Facebook. https://www.facebook.com/groups/529276933859491/
Thomas G. is offline   Reply With Quote
Old 11-28-2012, 08:40 PM   #10
Senior Member
 
Sue and Henry's Avatar
 
Name: Sue and Greg
Trailer: 1982 Burro 13 foot and a 2015 Casita Spitit Deluxe 17 ft.
Washington
Posts: 575
Registry
Quote:
Originally Posted by Thomas G. View Post

No, section is an engineering term referring to the cross sectional dimensions of the structural piece. By having a relatively tall aluminum lip on the front, my design gives the long front piece a lot of resistance to sagging. I found this extruded stuff at a recyclers, but one could use aluminum angle from a place like Home Depot or Lowes. In Norm's design the front to the cabinet provides section to resist sagging..
Got it. Time for yet another trip to Home Depot. I'm putting their kids through college! Not a bad thing. : )
__________________
Sue and Henry is offline   Reply With Quote
Old 11-30-2012, 03:24 PM   #11
Senior Member
 
Thomas G.'s Avatar
 
Name: Kinga DeRode
Trailer: For Sale Or Rent
Rooms to Let 50 Cents
Posts: 5,103
I'm at a point where I can post a few pictures of my shelf project instead of virtually waving my arms. I added a shelf to each end of the trailer with two side shelves in back and one short side shelf in front. Each shelf is made from 3/16" underlayment painted with exterior gloss paint to match the interior color. The aluminum is extruded in an L shape. Rather than drill holes, I attached to the window clamp ring, existing screws, or attached brackets with 3M Extreme double faced tape. The next step is to cover the screws to prevent snags and add a shock cord at mid level to hold things securely on the shelves. I may steal Raz's idea and add a mesh curtain to the shock cord.
Attached Thumbnails
IMG_3883.JPG   IMG_3882.JPG  

IMG_3881.JPG   IMG_3877.JPG  

IMG_3887.JPG   IMG_3886.JPG  

IMG_3879.JPG  
__________________
UHaul and Burro owners, join the UHaul Campers on Facebook. https://www.facebook.com/groups/529276933859491/
Thomas G. is offline   Reply With Quote
Old 11-30-2012, 03:39 PM   #12
Senior Member
 
Sue and Henry's Avatar
 
Name: Sue and Greg
Trailer: 1982 Burro 13 foot and a 2015 Casita Spitit Deluxe 17 ft.
Washington
Posts: 575
Registry
Your shelves look great Thomas. I just returned from Home Depot with thin plywood to replace the 14# sheet. I am still going to skin the new one with a couple layers of fiberglass to stiffen it up a bit then put on a layer of gel coat since I already have it to match.
__________________
Sue and Henry is offline   Reply With Quote
Old 11-30-2012, 04:37 PM   #13
Senior Member
 
Thomas G.'s Avatar
 
Name: Kinga DeRode
Trailer: For Sale Or Rent
Rooms to Let 50 Cents
Posts: 5,103
Quote:
Originally Posted by Sue and Henry View Post
Your shelves look great Thomas. I just returned from Home Depot with thin plywood to replace the 14# sheet. I am still going to skin the new one with a couple layers of fiberglass to stiffen it up a bit then put on a layer of gel coat since I already have it to match.

Thanks. If you are fiber-glassing over, the plywood itself doesn't add much strength, mostly weight. Sort of like an I beam, all the strength is in the top and bottom surfaces. Things like boats and surf boards are made of fiberglass over a foam core. But at any rate, a thinner board and aluminum angle should save you a lot of weight and be stronger, too.
__________________
UHaul and Burro owners, join the UHaul Campers on Facebook. https://www.facebook.com/groups/529276933859491/
Thomas G. is offline   Reply With Quote
Old 11-30-2012, 05:11 PM   #14
Senior Member
 
Jared J's Avatar
 
Name: Jared
Trailer: 1984 19' scamp
Kansas
Posts: 1,610
If you're fiberglassing anyway, and worried about weight, use honeycomb.
__________________

__________________
Jared J is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Tongue weight or hitch weight Cathi Towing, Hitching, Axles and Running Gear 26 04-24-2012 12:38 AM
help - I am interested in buying a small, light weight trailer- total weight 2000 pdd pwedd Hi, I am.... 19 07-23-2011 01:50 AM
How much weight could a shelf hold in a Scamp closet? Bryan L. Problem Solving | Owners Helping Owners 7 06-03-2009 10:50 PM
Tow weight vs vehicle weight Paula Bindrich Towing, Hitching, Axles and Running Gear 20 06-21-2007 09:16 PM
Tow Weight/Tongue Weight Legacy Posts Towing, Hitching, Axles and Running Gear 7 11-29-2002 08:49 PM

» Trailer Showcase

Doo Dah

RRoberts

Tilly

mstrong
» Upcoming Events
No events scheduled in
the next 465 days.
» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:54 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.