This is turning out to be a much more time consuming project than I hoped. Oh well, fortunately time is not money! Not much happened with the project over the winter, for a whole raft of reasons I won't bore you with but I finally got back into it a few weeks ago
The first stage was a whole lot of ripping down planks and cutting them to rough length on the table saw and the mitre saw.
One of the distractions that kept me busy elsewhere was a major excercise clearing the venerable parent's garage which was all but unusable due to decades of accumulated junk. The upside of that being that I could move my table saw and mitre saw in there temporarily which gave me more space to work with the full size planks.
Once the main cuts had been done, it was back to my shed to do the final ripping of the grating rails.
So I ended up with a whole lot of sticks 😁 which I laid out on the bench to check I had all the right parts in all the right places.Now way back last summer, my brother and I invested quite a lot of time and a very modest amount of money building a router table and jigs in order to cut the halving joints (of which there are a LOT!) quickly, easily and accurately.
You may recall that back then I knocked up a test grating out of pine using that setup and it worked very well.
Sadly, when I dug it out to use it for real I ran into a whole lot of problems. Firstly, the MDF base, despite being a> MDF, b> stored flat on a flat surface and c> stored in a dry shed, had warped in both planes. MDF should not warp! That's kinda the point of the otherwise cursed stuff (I hate working with MDF). I was able to pull the base back flat(ish) by bolting a steel u-channel frame under it.
So far, so good. However, when I ran some tests on the Iroko hard wood I discovered unacceptable chipping out on the back edge. Re-testing with pine confirmed that the 22mm router bit runs through softwood with no noticeable chipping out (as previously discovered) but it doesn't do the same with the hardwood. Mea culpa, I should have tested it with hardwood back then.
So with Plan A in the bin, it was time for a new Plan A ...
Digging some suitable scraps out of the offcuts bin, I knocked up a back stop and simple cross cut sledge for the table saw.I then glued a printed cutting marker strip to a length of pastic L channel.
From there, it's simply a case of screwing the marker strip to the rail and making repeated cross cuts with the saw blade set to 10mm depth of cut.
And when I say repeated cross cuts, each halving joint takes about 9 or 10 cuts. The end cuts are the only ones that have to be made with accuracy, the intermediate cuts can just be waffled out by eye.
How many cuts? Well, there's no less than 348 halving joints to make, each of which is in two halves (who'dve thunk it eh?) so that's 696 slots to cut in the rails. So something in the order of 6,000 to 7,000 cuts.Oh the tedium!
Oh the pain!
Yep, pain. I didn't, I hasten to add, remove any digits! I had gone to some lengths when building the cross cut slide to add finger guards and even so was taking great care. However, my arthritis limited cutting sessions to two or three hours a day.
It took about 8 days, maybe 25 to 30 hours of actual working time.The end result was a big stack of rails with roughed out halving joints roughly where the halving joints needed to be.
And rough is the critical word. The router method resulted in halving joints that fitted together with very little finessing needed.
The table saw method doesn't! They're close but there's an awful lot of clean up and final fitting needed for every joint. By hand with a rasp and file.

It is going to be a laborious and time consuming process to fit all the grating pieces together and it is what it is. I suspect it will take weeks.
With the benefit of hindsight ...
I would either ...
a> invest in a more effective router table setup that could rout the slots across the entire width of a plank before ripping the rails out (this didn't work with our creation as the slide table was too prone to wobbles) or ...
b> set up to run the router out of hand with a guide rail setup to create the slots across the full width of the planks.
In both cases, it would be necessary to sacrifice some plank width with fewer rails per plank (or wider planks to start with) so that any chipping out on the back edge would be removed when the rails were ripped out from the planks.
Or option C would be to spend a sh!t ton of money on much better professional grade machines! And a large enough workshop to put them in. That isn't on the cards unless I win the lottery!!!
I do not buy the old saw that "a bad workman blames his tools". A good workman will manage to do an OK job with shit tools, up to a point, but he'll do a better job with good tools. And to be frank, some of my tools are not great. The table saw was a cheap DIY machine I bought many years ago and it's just about OK for basic stuff. There are way better machines available now even on a tight budget. My mitre saw (which came from my brother) was fairly tired when he acquired it for peanuts second hand. Again, there are way better tools to be had for £200 to £300 now.
If I was starting again on this project, I would splash the case on some better tools. As it is, I don't currently have any future projects in the pipeline that would justify spending the money.
There'll be another hiatus on the project now as I'm off to the floaty thing next week for a few days to make sure she is still a floaty thing and get her ready to do some sailing. More of than anon.




































