The Breakroom > The Water Cooler
Building a Bridge
vtsteam:
The cast in loops are rated at 19,600 lbs, Andrew, and they won't be moved for another week and a half, as Dave is on vacation to Nova Scotia -- first cast will have 2 weeks cure by the time he gets back, and first cast, first placed, since we are moving in a line away from the excavator. Fairly likely all will have two weeks before the last ones are moved.
But they are curing very fast anyway in this heat (80-90F). They absorb a tremendous amount of heat during the day. When I unmold them in the cool of the morning after setting overnight, hot steam comes off of the sides. and you can feel the heat like a radiator just standing near. I wet them down twice a day so they don't dry out. Monday a roll of plastic is coming so I can have an easier time of it. But they are definitely moist baking which accelerates cure time..
I have to chip out the small amount of flash in the eye loops - maybe 3/8" thick, and it's tough going with a chisel even though they were cast only a day before. So I think a couple weeks is going to be fine.
The bed base is 4"-6" crushed rock 2' deep, 8' wide, 30' long. This is a rocky shale area anyway, and there is ledge adjacent to the bridge location. I figure the bridge static bearing is < 1000 PSF which would be very conservative for our soil type -- not to mention the rock bedding.
vtsteam:
Here's a SketchUp rendering with the 4x4x2 block and stone bed.
vtsteam:
Blocks all poured.
4800 lbs ea.
awemawson:
Yikes !
Pete W.:
Plus one for 'Yikes'!
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