GIS Buttstrap Question

**gsg270** · 3rd December 2009, 02:13 PM

I've just come to join the side panels of my GIS and have a question re the buttstrap length of 510mm that the plans quote. My side panels are 589mm deep at the join. The plans says the buttstrap should be placed 50mm in from the top and bottom edges. Does this mean the length of my buttstrap should actually be 489mm [589 - (50x2)] or have I made a mistake in lofting my sides?

All the lofting dimensions of the side panels were measured from the top of the ply sheets, and the shapes look correct.

My bulkheads and the transom are finished and I'm desperate to finish the side panels, ready for a dry run hull assembly. Can anyone clarify this for me please?

Thanks, Gordon

**Boatmik** · 3rd December 2009, 03:34 PM

Howdy Gordon,

The height of the sides at that point is exactly 589.2mm, so you have done a very nice job!

So, yes, bring the buttstrap measurement down to about 489. That should leave plenty of space for the chine log and inwale.

Best wishes
Michael

**BobWes** · 3rd December 2009, 03:39 PM

Thanks for that timely tip! (I am about to glue up the side panels, too.)

And, thanks to Gordon for asking the question. I probably would have just centered the butt strap at about 40mm from each edge.

**gsg270** · 3rd December 2009, 04:03 PM

What a relief! Many thanks Michael for the reply and good luck with your side glueing Bob.

I'll post some pictures once I've done my dry run hull assembly

Gordon

**woodeneye** · 3rd December 2009, 05:02 PM

Originally Posted by Boatmik

Howdy Gordon,
The height of the sides at that point is exactly 589.2mm
Michael

Mick demands a VERY sharp pencil Gordon!!!

I struck his tenths of a mm when making the spars

**gsg270** · 3rd December 2009, 07:06 PM

Originally Posted by woodeneye

Mick demands a VERY sharp pencil Gordon!!!

I struck his tenths of a mm when making the spars

Crikey Bruce, I thought you were kidding until I checked my plans for the spar dimensions. I don't know about a sharp pencil - a new pair of specs might be on the cards as well!

**PAR** · 3rd December 2009, 07:10 PM

I can't tell you how badly I've bitten my tongue on the "buttstrap" measurement. It must be an Aussie thing.

**m2c1Iw** · 3rd December 2009, 07:39 PM

Originally Posted by PAR

I can't tell you how badly I've bitten my tongue on the "buttstrap" measurement. It must be an Aussie thing.

Awh go on you know you want to.

**gsg270** · 3rd December 2009, 08:30 PM

Seems perfectly innocent to me.

Buttstrap Definition | Definition of Buttstrap at Dictionary.com

Maybe I'm missing something!!

**Boatmik** · 4th December 2009, 09:51 AM

While I was in the USA - you should have heard the guffaws when I asked in a couple of shops for a pair of thongs.

We do wear them to the beach and the straps are the same arrangement.

MIK

**Boatmik** · 4th December 2009, 09:56 AM

Originally Posted by woodeneye

Mick demands a VERY sharp pencil Gordon!!!

I struck his tenths of a mm when making the spars

Yap ... I am very apologetic for it in the plans text though!

I think I can mark with a pencil to about a quarter millimetre - or certainly half ... I don't really expect you to go to the tenths!

MIK

**woodeneye** · 4th December 2009, 12:03 PM

Originally Posted by Boatmik

Yap ... I am very apologetic for it in the plans text though!

I think I can mark with a pencil to about a quarter millimetre - or certainly half ... I don't really expect you to go to the tenths!

MIK

I realised that it would have been the design software that was responsible for this so I forgave you and just rounded them up or down. When the result is faired, the thickness of a sharp pencil line is as exact as is needed.

By the way, Irwin make a great pencil sharpener for those soft oblong shaped pencils. It has a cam action to take care of the non-round shape. Saves whittling them away so quickly!

**CCBB** · 4th December 2009, 12:09 PM

I'm running an after school boatbuilding group and I have been introducing all the fun words to them over the course: the typical bow/stem, stern/transom, port, starboard, etc, etc. The fun really started when we started into buttocks and futtocks, buttstraps and then there are the epoxy consistencies: peanut butter, mayonaisse, ketchup, etc.

They loved the futtocks and buttocks though. A few parents humorously brought up that it ended up as dinner conversation on several nightly occasions.

Who knew buttstraps could make a great thread.

**m2c1Iw** · 4th December 2009, 12:24 PM

Originally Posted by Compass Project

I'm running an after school boatbuilding group and I have been introducing all the fun words to them over the course: the typical bow/stem, stern/transom, port, starboard, etc, etc. The fun really started when we started into buttocks and futtocks, buttstraps and then there are the epoxy consistencies: peanut butter, mayonaisse, ketchup, etc.

They loved the futtocks and buttocks though. A few parents humorously brought up that it ended up as dinner conversation on several nightly occasions.

Who knew buttstraps could make a great thread.

Yep the big kids still get amused and Mik I can picture the face of the shop assistant.

Mind what do they call em over there flappers or some such.

**Boatmik** · 4th December 2009, 02:22 PM

Flip flops
Jandles (Jandals, maybe) (in NZ)

Do you want to go through the different names for the adjustable spanner?

MIK

Thread: GIS Buttstrap Question

Thread Tools

Search Thread

GIS Buttstrap Question

Similar Threads

A question

GIS buttstrap question

Dumb question alert:- Salt and pepper question again

An ROS question sander question for the box makers here

Serious Question

Tags for this Thread

Posting Permissions