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Old 02-02-2012, 06:44 PM   #1
Atomsplitter
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Welding Rear Crossmember on New Mar-K bed

I was talking to my local parts supplier that I got my new Mar-K bed parts from. He suggested that after the sides were bolted to the rear crossmember that I weld them together!
Anyone else do this or fell its necessary?
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Old 02-02-2012, 07:08 PM   #2
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Re: Welding Rear Crossmember on New Mar-K bed

My original Fleetside had spot welds between the rear cross sill and sides to help keep the bed sides from moving around when the tail gate is open. I remember grinding them out when I removed mine. Cavet, my truck originally came with a lift gate so it may have been welded after the fact.
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Old 02-02-2012, 09:40 PM   #3
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Re: Welding Rear Crossmember on New Mar-K bed

When I disassembled my original 51 box, it was welded along the edge of the side panel to the rear panel. I'm going to build my own box, so I think I will be welding it up. I don't want the side panels to move in or out, as they may over time if they are only bolted.
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Old 02-02-2012, 10:12 PM   #4
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Re: Welding Rear Crossmember on New Mar-K bed

my original 57 short stepside was welded along the seams between the rear sill and the sides.
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Old 02-03-2012, 03:15 PM   #5
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Re: Welding Rear Crossmember on New Mar-K bed

mine's welded



seriously... my original sill was welded too.
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Old 02-03-2012, 04:18 PM   #6
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Re: Welding Rear Crossmember on New Mar-K bed

I welded mine as well, but that was so based on style over substance. I wanted to shave the bolts for a cleaner look. Also since my bed floor needed to be raised to accomidate my frame, I also welded a filler plate to the roll pan to finish the look. I only remaining bolts were for the tail lights and the hindges.


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Old 02-03-2012, 04:34 PM   #7
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Re: Welding Rear Crossmember on New Mar-K bed

My 56 was welded, tacked on the ends, but after getting it crushed by a teacher at school, I chose to bolt the new one in just in case she did it again.
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Old 02-03-2012, 05:26 PM   #8
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Re: Welding Rear Crossmember on New Mar-K bed

That is one sweet truck youngrodder!
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Old 02-03-2012, 07:16 PM   #9
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Re: Welding Rear Crossmember on New Mar-K bed

Youngrodder-Did you weld the front panel of the bed also?
That is a sweet truck by the way.
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Old 02-03-2012, 08:42 PM   #10
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Re: Welding Rear Crossmember on New Mar-K bed

Front panel does not need it because the sides and end support each other in a 90 degree angle almost full height. Welding the back creates a little mini-moment connection to resist the side top moving laterally.
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Old 02-03-2012, 08:55 PM   #11
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Re: Welding Rear Crossmember on New Mar-K bed

Quote:
Originally Posted by _Ogre View Post
mine's welded



seriously... my original sill was welded too.
yours don't count! Ogre you are just different.


Makes life more interesting don't it though!
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Old 02-03-2012, 09:04 PM   #12
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Re: Welding Rear Crossmember on New Mar-K bed

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Originally Posted by mknittle View Post
yours don't count! Ogre you are just different.


Makes life more interesting don't it though!
mark
It really does look nice! i like the idea and the workmanship!
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Old 02-03-2012, 09:11 PM   #13
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Re: Welding Rear Crossmember on New Mar-K bed

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Originally Posted by youngrodder View Post
I welded mine as well, but that was so based on style over substance. I wanted to shave the bolts for a cleaner look. Also since my bed floor needed to be raised to accomidate my frame, I also welded a filler plate to the roll pan to finish the look. I only remaining bolts were for the tail lights and the hindges.


Marc
Looks great Marc! is the filler bent toe a 90 degree L shape or is it shaped like the stock sill on top?

Mark
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Old 02-04-2012, 12:04 AM   #14
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Re: Welding Rear Crossmember on New Mar-K bed

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Originally Posted by mknittle View Post
Looks great Marc! is the filler bent toe a 90 degree L shape or is it shaped like the stock sill on top?

Mark
Thanks for the kind words. Mine is not welded in the front. No need as mentioned by OrrieG. Plus with the way my bed mounts are, it would be difficult to remove the bed if the front was also welded.

As for the filler. I started with some thick bar stock welded in place. Then I took some sheet metal to close the gap.

Marc
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Old 02-04-2012, 12:19 AM   #15
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Re: Welding Rear Crossmember on New Mar-K bed

Thanks OrrieG and Youngrodder for the replies.
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