In this video, Jeff Lefkowitz explains why Moisture Control is a critical component of a strong joint in post & rung chair construction. --- Moisture control is controlling the moisture content of mating parts in a joint. In the Boggs chairs, the rungs are super dry (about 4% mc) while the legs are dry (about 8% mc) so this is known as Dry/Super Dry joinery. After assembly, the rung gradually takes on moisture expanding within the joint, making a tight joint even tighter.

In this video, Jeff Lefkowitz gives us a tour of his own Light Bulb Kiln and the inspiration for his design. --- Jeff's light bulb kiln is a simple plywood box insulated with 1” foil backed foam sheathing and heated with 3 incandescent light bulbs. He tries to maintain about 125°F to 140°F temperature which can easily be regulated by cracking the door, adding or removing bulbs, or covering and uncovering extra holes in the top. --- A key safety feature of the kiln is a piece of sheet metal placed between the lightbulbs and the rungs. This forces the heat to flow around the sheet metal and not directly up to the rungs which prevents scorching or fire.

Learn how some quick thinking at a 2008 class with Brian Boggs saved chair assembly day.