SIGforum
An Installment in the SIGforum "What is This?" Series - Construction-Looking Device on Flatbed Truck
June 20, 2017, 04:03 PM
a1abdjAn Installment in the SIGforum "What is This?" Series - Construction-Looking Device on Flatbed Truck
quote:
Those are tie down straps used to prevent stuff from falling off of trucks.
Things like trench boxes, shoring, trench shoring, trench shields, meteorite shelters, guillotines, caissons, etc.
June 20, 2017, 06:08 PM
flashguyquote:
Originally posted by PASig:
Is that also known as a caisson?
No.
quote:
In geotechnical engineering, a caisson is a watertight retaining structure used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, or for the repair of ships. These are constructed such that the water can be pumped out, keeping the working environment dry.
And, of course, an archaic usage is for a chest or wagon for holding or conveying ammunition. ("And those caissons go rolling along....")
flashguy
Texan by choice, not accident of birth June 20, 2017, 07:11 PM
ugeestaquote:
In geotechnical engineering, a caisson is a watertight retaining structure used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, or for the repair of ships. These are constructed such that the water can be pumped out, keeping the working environment dry. End quote:
Also, a caisson is a form of foundation. First a shaft is drilled into the ground, then reinforcing is inserted into the hole and then filled with concrete. Imaging a light pole base but 20 to 100 feet imbedded into the ground.
We will never know world peace, until three people can simultaneously look each other straight in the eye
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June 20, 2017, 08:20 PM
sigmonkeyThigh-master for those really big girls...
"the meaning of life, is to give life meaning" ✡ Ani Yehudi אני יהודי Le'olam lo shuv לעולם לא שוב! June 20, 2017, 09:55 PM
XLTGynecologist use those. not sure what for though.
June 20, 2017, 10:32 PM
nighthawkWaffle maker, really big waffles.
"Hold my beer.....Watch this".
June 20, 2017, 10:51 PM
jaaron11quote:
Originally posted by ugeesta:
quote:
Also, a caisson is a form of foundation. First a shaft is drilled into the ground, then reinforcing is inserted into the hole and then filled with concrete. Imaging a light pole base but 20 to 100 feet imbedded into the ground.
You are correct that the foundation you are describing is commonly called a caisson, but that is an incorrect designation. It is properly called a drilled shaft foundation. However, it is so commonly called a caisson that the difference has lost all distinction outside of geotechnical engineering circles. Much like magazine and clip.
J
Rak Chazak Amats June 21, 2017, 01:12 PM
bendablequote:
Originally posted by XLT:
Gynecologist use those. not sure what for though.
rosie o donnell
Safety, Situational Awareness and proficiency.
Neck Ties, Hats and ammo brass, Never ,ever touch'em w/o asking first
June 21, 2017, 06:26 PM
rtquigA trench box is required by OSHA any time you excavate deeper than 5'.
Living the Dream
June 21, 2017, 07:12 PM
Opus Deiquote:
Originally posted by rtquig:
A trench box is required by OSHA any time you excavate deeper than 5'.
You can slope walls, in some cases.
June 21, 2017, 07:27 PM
rtquigquote:
Originally posted by Opus Dei:
quote:
Originally posted by rtquig:
A trench box is required by OSHA any time you excavate deeper than 5'.
You can slope walls, in some cases.
True, but as you get deeper, the slope is so wide it is not practicable .
Living the Dream
June 22, 2017, 05:16 AM
Woodmanquote:
Originally posted by rtquig:
A trench box is required by OSHA any time you excavate deeper than 5'.
We put this in to the water main 7' deep. Most mains in Philly are 4.5' so little to no shoring. Curb vents, I remember one 13.5' deep. My buddy said if the hole collapsed, we'd find him at the bottom with his mouth pressed against the sewer, breathing its fetid air.
