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Forum topic by hazbro posted 1589 days ago 814 views 0 times favorited 7 replies Add to Favorites Watch
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hazbro

109 posts in 1593 days


1589 days ago

Anyone have any insight or interest in formwork? Building an outside profile of the final product and filling it up.

Here are some pics of my last project.

I regret losing the pics of the amphitheater before the fill in stairs, but it looked like Noah’s ark split in two six times.

-- measure once, keep cuttin' til it fits


7 replies so far

View GFYS's profile

GFYS

711 posts in 2074 days


#1 posted 1589 days ago

interesting…hope I get to sit in it someday.

View Chuck Shellem's profile

Chuck Shellem

36 posts in 1596 days


#2 posted 1588 days ago

In my youth I worked with a guy building forms for boat hulls. First you built a very heavy duty hull out of wood – the plug as I recall. Then that was sanded and waxed to death – mine. Next the plug was sprayed with gel-coat and layered with fiberglass and steel bracing to make the final mold. The plugs could actually be sold to build a all wood boat. My father and I built a work boat out of one. Not quite the scale of an amphitheater though.

-- -- Chuck S.

View hazbro's profile

hazbro

109 posts in 1593 days


#3 posted 1588 days ago

this took an eight man crew working a ton of OT roughly two months. they were awesome.

-- measure once, keep cuttin' til it fits

View Chuck Shellem's profile

Chuck Shellem

36 posts in 1596 days


#4 posted 1588 days ago

What happens to all that lumber? I don’t imagine that is high grade stuff and has a lot of nails and other issues… but still…

-- -- Chuck S.

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hazbro

109 posts in 1593 days


#5 posted 1588 days ago

the 16’ 2×4 waler pieces get saved, the rest goes into the wood recycle dumpster. the 1/2” mdo is $50-60 a sheet, but once you bend it and pour against it, it kinda laminates it into that shape permanently. so unless you’ve got another 85 foot radius wall/bench to do it’s done.

-- measure once, keep cuttin' til it fits

View bobkberg's profile

bobkberg

350 posts in 1676 days


#6 posted 1588 days ago

Cool looking project. I dare say most of us don’t work on that sort of scale.

-- Bob www.singularengineering.com - A sideline, not how I earn a living

View PineInTheAsh's profile

PineInTheAsh

401 posts in 1871 days


#7 posted 1588 days ago

My wonderful father-in-law and his brother worked, shaped and installed thousands of wood forms for concrete pours; from extreme below ground freeze to 50-story buildings.
One sage of advice was never re-reuse cement-smeared forms.

Naturally, being inquisitive as well as stubborn, had to experiment.
Within 20-seconds each on a grinder, then a ROS, the cloud of dust was impressive …and dangerous.
The dust cloud traveled some 75-100 feet.

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