Flooring Thickness of '77 Birchaven?

[Stu Rasmussen]

Greetings all,

I am in the process of replacing the black tank on my '77 Birchaven.

The replacement black tank from Jim K is slightly different from the OEM
and I need to make new hanger brackets to hold it up and in place, so
new screw hole locations will be needed.

The bottom-most layer appears to be thin aluminum sheet and I presume
there is plywood flooring above that - but how thick is it so I can put
in an appropriate screw (or twelve) to hold up the tank without piercing
the floorboards or the tub floor?

Thanks in advance

Stu

 

[Jim Hupy]

I" plywood above the aluminum.
Jim Hupy
Salem, Oregon

On Wed, Jun 3, 2020, 8:56 AM Stu Rasmussen (97381.com) via Gmclist <

> Greetings all,
>
> I am in the process of replacing the black tank on my '77 Birchaven.
>
> The replacement black tank from Jim K is slightly different from the OEM
> and I need to make new hanger brackets to hold it up and in place, so
> new screw hole locations will be needed.
>
> The bottom-most layer appears to be thin aluminum sheet and I presume
> there is plywood flooring above that - but how thick is it so I can put
> in an appropriate screw (or twelve) to hold up the tank without piercing
> the floorboards or the tub floor?
>
> Thanks in advance
>
> Stu
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

 

[Stu Rasmussen]

Excellent!

Thanks Jim!

Stu

> I" plywood above the aluminum.
> Jim Hupy
> Salem, Oregon
>
> On Wed, Jun 3, 2020, 8:56 AM Stu Rasmussen (97381.com) via Gmclist <

>
>> Greetings all,
>>
>> I am in the process of replacing the black tank on my '77 Birchaven.
>>
>> The replacement black tank from Jim K is slightly different from the
>> OEM
>> and I need to make new hanger brackets to hold it up and in place, so
>> new screw hole locations will be needed.
>>
>> The bottom-most layer appears to be thin aluminum sheet and I presume
>> there is plywood flooring above that - but how thick is it so I can
>> put
>> in an appropriate screw (or twelve) to hold up the tank without
>> piercing
>> the floorboards or the tub floor?
>>
>> Thanks in advance
>>
>> Stu
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

 

[s-m-h]

I just redid all my floors on my '77. On a ' 77 you have 3/4". Earlier models have 1"

You have 1" on the stairs and upper deck under the seats but the rest is 3/4"

You need self tapping screws to catch the aluminum crossmembers. I believe the factory screws are 1.5" or 1.75".

Good luck. I can send pics if needed.
--
Shawn Harris
North Vancouver,
Canada
1977 Palm Beach 403

 

[sgltrac]

Also need to account for the insulation I believe. The foam insulation is
about 1.5” iirc.

Sully
Bellevue wa.

On Wed, Jun 3, 2020 at 10:02 AM Shawn Harris via Gmclist <

> I just redid all my floors on my '77. On a ' 77 you have 3/4". Earlier
> models have 1"
>
> You have 1" on the stairs and upper deck under the seats but the rest is
> 3/4"
>
> You need self tapping screws to catch the aluminum crossmembers. I believe
> the factory screws are 1.5" or 1.75".
>
> Good luck. I can send pics if needed.
> --
> Shawn Harris
> North Vancouver,
> Canada
> 1977 Palm Beach 403
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

 

[Stu Rasmussen]

So (just to be sure I understand correctly) there is insulation in the
floor between the thin aluminum sheeting and the plywood? And this
applies to a Transmode base finished by Coachmen?

Thanks in advance ~

Stu

> Also need to account for the insulation I believe. The foam insulation
> is
> about 1.5” iirc.
>
> Sully
> Bellevue wa.
>
> On Wed, Jun 3, 2020 at 10:02 AM Shawn Harris via Gmclist <

>
>> I just redid all my floors on my '77. On a ' 77 you have 3/4".
>> Earlier
>> models have 1"
>>
>> You have 1" on the stairs and upper deck under the seats but the rest
>> is
>> 3/4"
>>
>> You need self tapping screws to catch the aluminum crossmembers. I
>> believe
>> the factory screws are 1.5" or 1.75".
>>
>> Good luck. I can send pics if needed.
>> --
>> Shawn Harris
>> North Vancouver,
>> Canada
>> 1977 Palm Beach 403
>>
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

 

[Jim Hupy]

Yes. Insulation thickness varies a bit, as it was sprayed in. But, Todd's
measurements are very close for a 1977.
Jim Hupy

On Wed, Jun 3, 2020, 1:32 PM Stu Rasmussen (97381.com) via Gmclist <

>
> So (just to be sure I understand correctly) there is insulation in the
> floor between the thin aluminum sheeting and the plywood? And this
> applies to a Transmode base finished by Coachmen?
>
> Thanks in advance ~
>
> Stu
>

> > Also need to account for the insulation I believe. The foam insulation
> > is
> > about 1.5” iirc.
> >
> > Sully
> > Bellevue wa.
> >
> > On Wed, Jun 3, 2020 at 10:02 AM Shawn Harris via Gmclist <

> >
> >> I just redid all my floors on my '77. On a ' 77 you have 3/4".
> >> Earlier
> >> models have 1"
> >>
> >> You have 1" on the stairs and upper deck under the seats but the rest
> >> is
> >> 3/4"
> >>
> >> You need self tapping screws to catch the aluminum crossmembers. I
> >> believe
> >> the factory screws are 1.5" or 1.75".
> >>
> >> Good luck. I can send pics if needed.
> >> --
> >> Shawn Harris
> >> North Vancouver,
> >> Canada
> >> 1977 Palm Beach 403
> >>
> >>
> >>
> >> _______________________________________________
> >> GMCnet mailing list
> >> Unsubscribe or Change List Options:
> >> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >>
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

 

[s-m-h]

Is anyone else seeing the last post as though it was mine? Strange..as it was not.

Call me if you want clarification...778-580-5161

Shawn
--
Shawn Harris
North Vancouver,
Canada
1977 Palm Beach 403

 

[Richard RV]

Stu,

Here's an earlier thread that might be helpful.
http://gmc.mybirdfeeder.net/GMCforum/index.php?t=msg&goto=156544&rid=0

Richard
--
'77 Birchaven TZE...777;
'76 Palm Beach with 18,477 verified miles;
‘76 Edgemonte

 

[Richard RV]

> Is anyone else seeing the last post as though it was mine? Strange..as it was not.
> Shawn

Yep, I'm seeing it. Your normal posting has a Canadian flag icon and the one in question you didn't send has an American flag, if that means
anything.

Richard
--
'77 Birchaven TZE...777;
'76 Palm Beach with 18,477 verified miles;
‘76 Edgemonte

 

[74_Coach]

What is the thickness of the front cab floors on a ‘74 Canyon Lands? I need to replace the passenger cab floor due to a water leak from the side
window.
--
Ed Clerkin | 1974 GMC Canyon Lands 26’