installing flat bed? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chucks70 · 03-07-2004, 08:45 PM

I have a flatbed to put on my C30 frame and was wondering how to mount it. It has 2 heavy support rails runnig the length of the bed that are the same width as the frame. If I bought regular bed cross sills and bolted them through the regular bed mounts on the frame, would they be heavy enough to support the bed? I know the sills will extend much farther than I need but I was thinking of making a too box from 1/8" flat steel to hang from them.

walker · 03-07-2004, 09:41 PM

Yes, they should be heavy enough, as they are too carry no more weight than the original bed was intended for .3/4 ton is 3/4 ton no matter the bed design. I have seen the brackets made of flat bar or channel iron usually though, and that is just to tie the bed frame to the truck frame.

ronh72c10 · 03-08-2004, 11:59 AM

Not meaning to hijack the thread, but here's another flatbed question.

I'm about to start work on the flatbed for the wife's truck, assuming that the rear axle was bottomed out against the bump stops and that I'm running 15" wheels I should have 3" between the top of the tire and the bottom of the bed, does this sound like enough?

Ron

**JIMs70GMC** · 03-08-2004, 12:34 PM

I have a flat bed for sell if anybody is interested. It came off of a 71 and has a stainless deck. I have it off the truck and can post picks of how it was mounted if you want.

dubie · 03-08-2004, 12:41 PM

This is how mine sits. It hasn't been bolted down and in this pic it's just shimmed with some wood to get the right rake. From the top of the tire to the bottom of the flatbed is 4.5". That is with brand new shocks and new variable rated coils on the back

sneakysnake · 03-08-2004, 12:49 PM

Would it not be easier to place the bed how you want it to sit and fab some brackets out of angle down to the frame?

dubie · 03-08-2004, 12:52 PM

Thats how I am doing it in 2 spots. The rest will have mounts made out of C channel

chucks70 · 03-08-2004, 08:39 PM

Jims70Gmc and Dubie do you have pics of your mounting. Right now I have a 4X4 with a couple of other pieces of wood across the frame rails to get it to look right on the frame.

**JIMs70GMC** · 03-08-2004, 08:59 PM

1 bed off 71 you can see the angle iron used. two c-channels on the bed rested on the angle iron.

**JIMs70GMC** · 03-08-2004, 09:00 PM

2 you can see the c-channel barely

**JIMs70GMC** · 03-08-2004, 09:01 PM

3 rear of bed you can see the channel a little better. this bed was meant to tilt, although it was never finished. In the first pic you can see the piviot point.

03-07-2004, 08:45 PM	#1
chucks70 Registered User Join Date: Feb 2002 Location: Cadiz, OH Posts: 628	installing flat bed? I have a flatbed to put on my C30 frame and was wondering how to mount it. It has 2 heavy support rails runnig the length of the bed that are the same width as the frame. If I bought regular bed cross sills and bolted them through the regular bed mounts on the frame, would they be heavy enough to support the bed? I know the sills will extend much farther than I need but I was thinking of making a too box from 1/8" flat steel to hang from them. __________________ 68 1 ton dually 292, 2001 Sebring, 2004 Trailblazer, 11 Camaro Convertible.

03-07-2004, 09:41 PM	#2
walker Registered User Join Date: Jul 2003 Location: north of Phx AZ about 30 miles Posts: 698	Yes, they should be heavy enough, as they are too carry no more weight than the original bed was intended for .3/4 ton is 3/4 ton no matter the bed design. I have seen the brackets made of flat bar or channel iron usually though, and that is just to tie the bed frame to the truck frame. __________________ Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold

03-08-2004, 11:59 AM	#3
ronh72c10 Senior Member Join Date: Jul 2003 Location: Mount Forest, Ontario, Canada Posts: 978	Not meaning to hijack the thread, but here's another flatbed question. I'm about to start work on the flatbed for the wife's truck, assuming that the rear axle was bottomed out against the bump stops and that I'm running 15" wheels I should have 3" between the top of the tire and the bottom of the bed, does this sound like enough? Ron __________________ 72 Chevy C10 (rust repaired, starting body work) 72 GMC 3/4ton 4x4 72 Chevy C20 Suburban 38 Ford Tudor Humpback Sedan (from the darkside) 67 Pontiac Parisienne 55 Studebaker Commander 2dr Hardtop (Starliner) My Youtube channel with Video Updates!

03-08-2004, 12:34 PM	#4
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	I have a flat bed for sell if anybody is interested. It came off of a 71 and has a stainless deck. I have it off the truck and can post picks of how it was mounted if you want. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

03-08-2004, 12:41 PM	#5
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,855	This is how mine sits. It hasn't been bolted down and in this pic it's just shimmed with some wood to get the right rake. From the top of the tire to the bottom of the flatbed is 4.5". That is with brand new shocks and new variable rated coils on the back Attached Images __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

03-08-2004, 12:49 PM	#6
sneakysnake It's a catastrophic success. Join Date: Jan 2003 Location: Oklahoma Posts: 2,077	Would it not be easier to place the bed how you want it to sit and fab some brackets out of angle down to the frame?

03-08-2004, 12:52 PM	#7
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,855	Thats how I am doing it in 2 spots. The rest will have mounts made out of C channel __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

03-08-2004, 08:39 PM	#8
chucks70 Registered User Join Date: Feb 2002 Location: Cadiz, OH Posts: 628	Jims70Gmc and Dubie do you have pics of your mounting. Right now I have a 4X4 with a couple of other pieces of wood across the frame rails to get it to look right on the frame. __________________ 68 1 ton dually 292, 2001 Sebring, 2004 Trailblazer, 11 Camaro Convertible.

03-08-2004, 08:59 PM	#9
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	flatbed 1 bed off 71 you can see the angle iron used. two c-channels on the bed rested on the angle iron. Attached Images __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

03-08-2004, 09:00 PM	#10
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	bed 2 you can see the c-channel barely Attached Images __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

03-08-2004, 09:01 PM	#11
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	bed 3 rear of bed you can see the channel a little better. this bed was meant to tilt, although it was never finished. In the first pic you can see the piviot point. Attached Images __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

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