The traditional style also requires that you list all of the materials that you will need for construction of the beds. A crafter who doesn't keep a complete inventory of what they have available on their site will be much less likely to run out of materials midway through a job. If you're building from scratch, then you should check on the site to make sure that there are no items left out that a crafter could order. This is especially important when ordering specialty beds such as those with drop sides. https://mkfurnishings.co.uk/shop-bunk-beds/L-Shape-Beds-c118744761