16/10/2026
So, what wood goes into making a riven oak ark? Here are some step-by-step shots of a small one made for The Shakespeare's Birthplace Trust that has popped up in a couple of recent posts.
Riving timber, splitting rather than sawing it from the tree trunk, is easiest over the shortest lengths possible. Having cut the round log to an appropriate length, it was first split through the centre into two semi-circular halves. The halves were then split again through the centre into quarters, and the process repeated again and again, reducing the pieces into ever thinner ‘cake slices’ until roughly useable dimensions were reached (pics 1 & 2).
Wide boards were required for the front and back horizontal rails and side panels, roughly the full width of the available material (pic 3). The four vertical ‘legs’ were narrower and needed reducing in width. Splitting the legs to width was far quicker than sawing. The split was started in the appropriate place with a cleaving axe (pic 4) before being opened up with a froe (pic 5). The cleaving axe has a thin tapering edge that finds its way easily into the fibres of the wood. The froe is driven into the resulting split, rocking the handle ‘to and froe’ opens it up and continues the split down the length of the board. The narrow off-cuts from each leg were retained to use for the side rails (pic 6).
The front and back of the ark are each made up from one wide horizontal board that will be joined, between two narrower vertical legs (pic 7). This three board construction is known as a ‘clamp-front’ – the front clamped between the legs with a long mortice and tenon joint. Chests of this construction are known as clamp-front chests. It is a technique common in the medieval period but less so as time progressed and large trees yielding the wide boards required became increasingly scarce.
The boards for the sides and top of the ark required reducing in thickness and were once again split with the froe. Controlling these wide splits requires the straightest grained timber possible and keeping similar amounts of wood either side of the split to help ‘balance’ it and prevent it running off in one direction or the other (pics 8 - 11). Once split, the two halves can be opened up like a book with the grain matching identically in reverse on either side (pic 12).
The top of each ark required three riven boards held between two end pieces. The clamped front and back required three boards each and were joined together with two wide side boards (pic 13). A couple of narrow rails help secure the sides, and with the addition of a wide board for the floor, and that’s pretty much all the materials sorted – sixteen pieces riven by hand, ready for preparing and joining by hand. More on that to follow.