Thursday, January 5, 2017

Musings About Making a Top Bar Hive—the basics




The beauty of a top bar hive is that they can be made easily and economically. 

Although the Langstroth system is the hive of choice for most beekeepers, it is not perfect. The top bar hive (tbh) fills the void for those potential beekeepers who are looking for a needed alternative.  These are not only people in a developing country like Honduras, where I live, but also for some people in developed countries like the United States.


My wife Sofia and one of our simple top bar hives on a Honduran coffee farm.

Their main advantage for me is that they are very economic. I can start bees in four or five tbhs for what I would spend on one three-box Langstroth hive. The former is expensive, and even more so when you include all the extras needed to use them as they were intended—an extractor, frames, wax foundation and queen excluders.

And the other advantage is that people don’t need to be an expert carpenter to build one. Even though I consider myself fairly handy in wood working, if my measurements are off a bit or my cuts are a bit crooked, the box will still work. 

You should also be able to make the box with only a handsaw if it comes to that point. That’s actually how I had to start out. I put a lot of sweat into those first boxes but sometimes you need to do what you need to do.

A table saw is nice but not everyone has access to one. Only the bars, which need more exact measurements and straighter cuts, require the use of this power tool. But these are usually easy and cheap enough to contract out to a carpenter.

A top bar hive has two main parts—the box and the bars. The guidelines in this post are for making a basic trapezoidal top bar hive—nothing fancy and with no extra options added, like an observation window or ventilated bottom. For the most part, it’s how I build my tbhs. I keep it simple.

Know, however, that there are other options and details that can be added when making these hives.
 
There is not one standard size for a top bar hive. This is both good and bad. 

A negative is that if you inherit a tbh with bees or buy a tbh nucleus hive, it may not fit in your box. Your box may be narrower or shallower for the combs that you are receiving. You may have to trim the them so they fit. The problem may also occur if you make nucs for sale and they don’t fit into you client’s box.

The positive side is that you make your box according to your local climate conditions or the materials you have available. There is no one correct size for them.
The length of available boards may dictate whether you make a four or five-foot long box. The width of the available boards may dictate whether the box will be 10 inches or 12 inches deep.

The climate and temperature can also influence the measurements. In a very hot climate, you may want a shallower box to avoid comb collapse during high temperatures. A smaller comb means less weight. You can probably use a deeper box without a problem where the temperatures are cooler in a northern climate or in the mountains of a tropical area. Also, consider temperature issues if the hive will be in full sun or a shaded area. 

So, you need to decide on a size and use it as your standard for all the tbhs you will eventually have. You want to keep at least everything within your own apiary the same size. You want everything to be interchangeable.


A slightly shallower top bar hive for Jamaica’s warm climate.

Since I began beekeeping as a Peace Corp volunteer, my original plans came from one of their manuals, “Small Scale Beekeeping.” At that time, 1991, I didn’t have access to internet (Was there even internet at that time anyways?) and my learning resources were limited. I used the plans the book gave me. Luckily they worked well with Honduras’ Africanized bees. I’ve used the same sized box for 25 years now.
 
These plans called for a trapezoidal box with internal measurements of 12 inches deep, 17.5 inches across the inside of the top and 7.5 inches across the inside of the bottom. 

But as I mentioned, one of the factors that determines the size of your boxes is the materials available. If I need boards in Honduras, I have someone cut down a pine tree and saw it up. My original plans called for a box that was 12 inches deep so I had them cut 12 inch boards.

I’ve given some tbh trainings in Jamaica. The easiest way to get wood in Jamaica is to buy pine boards at the hardware store. This wood is imported but it is sometimes the cheapest and easiest option. But these boards were only about 11 ¼ inches wide. Because of this, they made the boxes shallower—based on a design by Les Crowder.

Boards are not the only option for making a tbh box. You can use recycled wood from pallets or alternative materials such as bamboo or metal cans. See this post on the blog: Musings About Economical Beekeeping: Inexpensive Alternative Hive Materials

The bottom can be one continuous board. You could also use your scrap pieces of wood and join them together to form the bottom.


A top bar hive I made with my brother in Wisconsin from old barn boards and pallets. It used the same internal measurements as my Honduran tbhs—12 inches deep, 17.5 inches across the inside of the top and 7.5 inches across the inside of the bottom. The bars are 19 ¼ inch long so they can fit in a Langstroth box if necessary.

I usually advise people to make the box at least four feet long. It can be longer. In fact, that’s probably better. 

You don’t want to run out of space. The bees swarm when they sense there is no longer room for the queen to continue laying eggs or for the workers to store nectar. Most of my boxes are about five feet long to help prevent this.

If you do intensive management, you will stay on top of space issues in a shorter box. If you do minimal management (like I do with some of my hives) you will want the longer boxes with more space as extra insurance against them running out of room. 

Having a longer box also gives you an initial working space at the end. If the last couple bars are empty, it is much easier to remove that first comb. It can be difficult to remove that one when the bees fill the box completely from one end to other.

But again, the length will depend on the material you have available. If I find boards that are nine feet long (there is no standard size for boards in Honduras), I will make my boxes only 4 ½ feet long. I deal with what I get.


Four-foot hives in my coffee farm apiary. The two hives in the back are five feet long, my preference. The length was dictated by the available wood, in this case recycle boards from the construction of a building.

Entrance locations can vary according to the want of the beekeeper. I place all my entrances at one end with a small two-inch landing board. In part this is so I can set a pollen trap on it for use with my hives. Sometimes I will add an extra smaller entrance at the back.

Other beekeepers prefer a side entrance—just several one-inch holes in the middle or sometimes toward the end. Still other beekeepers simply leave a bar out to form a top entrance. 

There really is no correct answer for this. It is more the preference of the beekeeper. If you think about wild colonies, they never have their entrances in a specific space. All the entrances are according to the cavity that nature created or the structure man made. Sometimes they need to enter from below, sometimes from the side and sometimes from the top. Sometimes there are multiple entrances. The bees adapt to what they must use.


One of my top bar hives with a two-inch landing board at the main front entrance but also a smaller back entrance. This secondary entrance sometimes becomes the bees’ main choice to come and go from the hive. Notice the darker yellow pollen smudge around the entrance from the heavy traffic it had.

The only thing that really needs exact measurements is the top bars. The norm for the top bar’s width is 1 3/8 inches or 3.5 cm. The groove underneath for attaching the starter strip should be exactly in the middle. It only needs to be one-quarter inch deep. The idea is that each bar has one comb built from the center.

I recommend using a length of 19 ¼ inches so the bar will fit into a Langstroth hive if you want to temporarily transfer a comb into one. For example, the Langstroth hive went queenless but you can give it some good brood from strong productive colony you have in a top bar hive.

Or the opposite could be true if you use a Langstroth colony to begin comb on top bars for starting a tbh hive.

The thickness I use for my bars is normally 5/8 of an inch. It can be more. If you go thinner, especially less than ½ inch, the bar might bow downward because of the weight of a comb.

There was a top bar project I read about that used paint stirring sticks. They were the correct width and easy to obtain but rather thin. After a time, all the sticks were bowed downward from the weight of the comb on them.


The bars should also have a starter strip. The idea is that something hangs or protrudes down a bit so the bees use it as a guide to build the comb along the very center of the bar. It only needs to hang down about one-quarter of an inch. Having a wider starter strip can actually complicate things—the bees do not attach their comb securely to the bar itself, only to the guide. The result is eventual comb collapse.

The starter strips are normally something simple. I often use half-inch strips of paper that I dip into melted wax two or three times to get a good thickness. They are then glued into the bar’s groove with some more wax. I’ve also used wax covered popsicle sticks.

Other possibilities are just a simple wood wedge, a piece of wax covered string or a strip of foundation. Some beekeepers promote not even using starter strips (which implies feeding empty bars between well-center combs, which you need first—usually with bars that have starter strips).


The bees use a starter strip to ensure the comb is built in the very center of the bar. This starter stirp is waxed-covered popsicle sticks.

Other than this, add some sort of cover for the rain and a stand to set it on and you’re ready for the bees.

See these following resources for other options for top bar hive construction.

Peace Corps’ “Small Scale Beekeeping”—the original 1983 version by Curtis Gentry. This is what I had and used as a volunteer. The tbh plans are on page 110. All my top bar hives are based on these measurements.

Peace Corps’ “Small Scale Beekeeping”—an updated 2014 version of the book. It has plans for a tbh on page 133 but they are for a slightly different model and with slightly different measurements from the original book. 

“Build Your Own Top Bar Hive” by Yerba Buena Farm in St. Mary, Jamaica. Their manual is for making tbhs using the imported pine boards commonly found in hardware stores on the island. This is basically the same size for Les Crowder’s hive. They also offer a one-page handout for this tbh, with all the basic information.

“How to Build a Top Bar Hive” by Phil Chandler of Barefoot Beekeeping and the biobees.com Natural Beekeeping Forum. This is his free manual for making his version of a top bar hive. You can get his 2015 version for free from his Lulu book sales page with the first link or a slightly earlier version directly from this second link.

“How to Make a Movable Comb Top Bar Hive” by Pam Gregory, who has done beekeeping trainings in Africa. This is through FAO’s TECA website.


A search on the internet will give you other plans and other top bar hive designs (enough to overwhelm you maybe!).

---Tom


Piecing together the floor during one of my top bar hive construction workshops in Jamaica.


Simple wax covered strips of paper for starter strips or comb guides.

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Comments and questions are always welcomed.

4 comments:

  1. Great post. I tried to make the wax-covered strips and this wasn't as easy as I thought it to be. The first time we tried to melt wax by using a flat plan on low cooking gaz-fire. Within minutes we were surrounded by bees, so we stopped that trial. The next day I put the wax on an aluminum pan and covered it with a glass sheet. In the sun and it melted nicely and bees were not interested. To get a smooth and even cover of the paper strips was not so easy, maybe because it was because of the flat pan we used. But to paste them into the grooves with a spoonful of liquid wax was easy, but one has to be quick as the wax hardens quickly. We made about 55 wax-strips. Thanks for the information.

    ReplyDelete
  2. Saludos Job. I´m glad the information in this post was useful for you.

    I usually use a deeper container/bowl/pot when making the starter strip. I melt the wax in a double boiler. The paper sort of folds over as it goes down into the wax. If you notice in the picture, the ends seem to be covered with a bit less wax—that’s because this is where I hold onto them when dipping. I don’t want to burn my fingers. You can always dip just that tip to cover them better.  

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  3. Hi Tom,

    My name is Anuj Agarwal. I'm Founder of Feedspot.

    I would like to personally congratulate you as your blog Musings on Beekeeping has been selected by our panelist as one of the Top 60 Beekeeping Blogs on the web.

    http://blog.feedspot.com/beekeeping_blogs/

    I personally give you a high-five and want to thank you for your contribution to this world. This is the most comprehensive list of Top 60 Beekeeping Blogs on the internet and I’m honored to have you as part of this!

    Also, you have the honor of displaying the badge on your blog.

    Best,
    Anuj

    ReplyDelete
  4. Thanks, Anuj, for making me part of your list of top beekeeping blogs. I am also honored that you have included me as part of this list of prestigious blogs.
    ---Tom 

    ReplyDelete