Category Archives: Civil

French doors and frames

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I was asked by a gentleman and his wife to construct and install a solid wood frame and a french door. They wanted to seperate their family room and front hallway while still retaining the light emitting from the front door. In addition the added insulation to the main bedroom was a very welcome quality. As with all construction work as long as the tradesman keeps to the sound building principals the results will always satisfy the tradesman and please the owners or engineers.

The owner is a bit of a handyman and decided that he himself was going to install the architrave and the infill and there by saving some costs of construction. This is a relatively normal event as some people either don’t know how to proceed with certain parts of their project or do not have the necessary tooling. In any event, EarthRam is here to help.

Rammed earth mixer

Hi,

I build rammed earth dwellings. So trying to find ways of mixing my raw material, which in most cases is crushed limestone, is always on my mind. A while ago I built an attachment for my bobcat that would do just that. However, my assessment of the pressures involved on the end of the ‘paddles’ was a tad out. In the last few weeks I fixed that issues, but of course, other issues arose, right on cue as expected. Nevertheless, the adjustments to the mixer were actually successful, and today as I built a second wall in the current project, I used it for the first time, it worked very well, I was very pleased.

The next problem along the ‘issues chain’ is actually the chain. A third of a cube of crushed limestone is roughly 450kg dry weight, and that is a lot of stress on the chain, which at one point begins to jump. I get about a turn and a half before it decides to take a leap to the next tooth of the drive pulley, but that is enough for the material to mix with the cement and water. I have a 600mm helix set up around a 50mm 4140 shaft in a 1530mm bucket. The bobcat hydraulic pump is handling the load very well as is the main hydraulic motor on the mixer, but the chain is ‘a bitch’n.

Im thinking about installing a gear box of appropriate strength to handle a full 500kg load. But for now gently nursing the 5/8 chain is my only option.