# Thread: nutshell pram mast step

1. Junior Member
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Jan 2019
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Kelowna, British Columbia, Canada
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## nutshell pram mast step

The very indispensable and well written book, "Building the Nutshell Pram by Maynard Bray" shows positioning the maststep using a level to determine a vertical. This, of course assumes that the hull is horizontal. How do I set the hull level first??

Bob Runnalls

2. ## Re: nutshell pram mast step

On a level floor put a straightedge across the boat and measure the same distance to the floor on each side, then chock the boat to that position. Make sure the straightedge is perpendicular to the centreline by having it cross at the same place on each side.

3. ## Re: nutshell pram mast step

How far into the build are you?

I just installed the step and waited until i was installing the thwart (mast partners?) before i worried about the angle of the mast.
Also, keep in mind, its a lug sail - there is room for error by moving the gaff fore or aft, relative the the mast.

I don't think it's something you need to sweat too much.
http://forum.woodenboat.com/showthre...9-6-quot/page4

4. ## Re: nutshell pram mast step

Originally Posted by surveyor464
The very indispensable and well written book, "Building the Nutshell Pram by Maynard Bray" shows positioning the maststep using a level to determine a vertical. This, of course assumes that the hull is horizontal. How do I set the hull level first??

Bob Runnalls
Across ways or for and aft.
If across ways, follow Stillettos instructions, but I would be surprised if you are not building level anyway, how else do you make her symmetrical?

If for and aft, make a tapered spacer capturing the angle between the boat and straight edge. Then use this to set the perpendicular with your bubbly level to the ford and aft "level" of the boat.

5. Senior Member
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## Re: nutshell pram mast step

You won't need a level floor if you measure and mark back the same distance on each side then put the level across that. You can do the same with a string and a line level fore and aft if you can get reference points on the 2 transoms from your drawing.

6. Junior Member
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## Re: nutshell pram mast step

Thanks for that. Will do just as you say. However, my concern is leveling the hull fore and aft. Any suggestions.

7. Junior Member
Join Date
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## Re: nutshell pram mast step

The boat is finished in the rowing configuration and am now converting to sail.

8. ## Re: nutshell pram mast step

Originally Posted by surveyor464
Thanks for that. Will do just as you say. However, my concern is leveling the hull fore and aft. Any suggestions.
post #4

9. Senior Member
Join Date
Nov 2011
Location
Salt Spring Island, BC
Posts
7,369

## Re: nutshell pram mast step

Looking at plans drawings online it appears that you can get fore and aft level very close by eye measuring up from the floor.

10. ## Re: nutshell pram mast step

Originally Posted by Gib Etheridge
Looking at plans drawings online it appears that you can get fore and aft level very close by eye measuring up from the floor.
Or from the mid thwart and daggerboard case top which are level on the drawing. So stand a straight edge on them and slide it forward to touch the bow. Then use a set square to find the perpendicular.
Or use a spirit level on the thwart to set her level when propping up the hull on its cradle or trailer.

11. ## Re: nutshell pram mast step

Close enough is good enough I think.
Level when its sitting in the shed is a lot different to level when its in the water and you're sitting in the back. I'd go with 'aesthetically pleasing' angle.

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