As promised I am putting transmit facts on the premise of iron balusters. During the day, one of the most base questions I get from customers is the how to of iron baluster installation.
Many building codes wish three balusters on a tread to comply with the 4" sphere rule. Check with your local code officials if you have any doubts about your stair's compliance.
Spade Drill Bit
First, I let the buyer know that the very last thing in balustrade premise is the iron balusters. It simply works well to install the newel posts, handrail, treads and risers first. Once installed layout the balusters on the floor and use a level to plumb up to the handrail town and mark the relationship at the town lowest of the handrail. Using a ½" paddle or spade bit one can drill upward 1" deep into the handrail. Using a 5/8" paddle bit drill a hole no more than ¼" deep into the floor. Once these are drilled out the lowest of the handrail can be sanded with an orbital sander and the unblemished balustrade law can be stained and finished. Once the stain and stop is completed one can begin installing the iron balusters.
One of the following two tools is recommended for cutting iron or metal balusters: a power miter box with a metal cutting blade, or a transportable band saw. My preference is the transportable band saw. It works cleaner, is more portable, and doesn't cause sparking as does the power miter box (or chop saw).
Turn the baluster upside down and set the round dowel top into the hole in the floor, holding the baluster plumb to the hole under the handrail. Mark the baluster with a pencil, quantum up 3/8" minimum and that would be the cut mark. Note that you are cutting off the bottom, not the top, of the baluster. This ensures permissible alignment of the fabricate elements.
For gluing the installer has two options: Epoxy or building adhesive. My personal preference is building adhesive as I have more control over the product and, if it gets messy, wipes away actually and can also serve as a caulk nearby the iron. Epoxy comes in the mixing tubes and doesn't all the time mix properly. If it gets messy and dried, removing the epoxy also removes the powder coating on the iron. Some carpenters prefer and have their own control over epoxy. I do not. I find building adhesives easier to work with.
Squeeze a small number of the adhesive into the hole under the handrail. The adhesive is thick and slow and will not drain back out, giving time to unblemished the installation. Make sure the shoe for the iron baluster is slid up while installing. Push baluster's round dowel up into the ½" hole under the handrail and then drop it into the 5/8" hole in the floor in a bed of added building adhesive. Square off the baluster's alignment then drop the shoe down to the floor. If the shoe comes with a set screw, use an Allen wrench to tighten it. The glue in the handrail hole will conclude nearby the baluster creating a perfect seal. Once the glue has dried the baluster will be well secured, even helping to develop the handrails load.
When installing 5/8" iron balusters the process is identical, one only needs to drill a 5/8" hole under the handrail and a ¾" hole at the floor. 5/8" iron is ideal in remodeling work, when replacing wood balusters. Most installed wood balusters have a 5/8" hole under the handrail and a ¾" hole at the floor. If replacing wood balusters with ½" iron it is normally recommended to install shoes under the handrail to cover a small Square peg in a larger round hole. The use of wood or cabinet screws helps to lock the baluster in, serving as both a wedge and forcing the baluster on center.
Round 5/8" iron or metal balusters can be installed without shoes simply by drilling a 5/8" hole into the handrail and into the floor and following the same course outlined above.
I have been asked about manufacture the holes square. It is potential with a little more work. To cut the Square hole in the floor or handrail, drill a round hole in the wood the same size at the baluster's wide width. Then chisel out the hole to make it square. Someone else selection is a "mortising bit." I have not used one of these but have spoken with carpenters who have. Their commentary tends to be that this method is a "pain in the you know what."
How to install Iron Or Metal Balusters in Wood Handrails