Looking to use N80 casing pipe ~8"x1/2" thick in a structural application. From published specs, Fy ranges from min 80 to 110ksi, Fu is minimum 100ksi.
Casing would be used as soldier piling for earth retention and will be installed by drilling using flush-threaded connections. This application...
Can anyone tell me if I need to use t_des = 0.93 x t_nom for A513 tubing that is drawn over a mandrel, as is specified by AISC for A500 HSS?
All assistance appreciated
J
Is there any literature on the movement of piles when the ties are released/detensioned? I've been asked to comment on this, but it's the first time anybody has asked. My initial Google has not turned up any obvious results...Any help appreciated.
J
I would like to design nodal bracing for a pair of channels oriented back to back with a large gap between them to make a built-up beam member. The intention is to provide enough bracing to maintain the full flexural capacity of the built-up section along the entire length.
I have the maximum...
PEInc was good enough to point me to information on how to prestress bracing members in reply to one of my posts in the Structural Engineering fora.
I am now interested in learning WHY these members are prestressed. Also, why are only members longer than say, 50ft (~17m) required to be...
The project specifications for a braced excavation support structure require that we prestress the excavation strut members that are in excess of 50ft in length to 50% of the design load. We have determined that pipe sections of 24 and 30 inch diameters @ fy=42ksi will be suitable for use as the...
Situation: Back-to-back 10" channel sections are joined with spacer plates which are welded to the backs of the channels. The composite double-channel beam is simply supported, and is loaded at discrete points.
The point loads are such that the spacers need to act as torsional restraints so...
Just got back from IFCEE 09 in Orlando. Many good papers and a great opportunity to meet the equipment vendors and "kick the iron".
PEInc, a pleasure meeting you in person, and an enjoyable case history presentation, as well.
Jeff
I will be connecting a hook fabricated from 3-inch plate to a 9x5x0.5 RHS using a bolted connection. The 3-inch thick piece will fit inside the RHS and shim plates (holes, not fingers) will be inserted on both sides between the 3-inch piece and the webs of the RHS, so I can snug-tight the bolts...
I would greatly appreciate any engineering information for asbestos-containing TRANSITE pipe. I have a project where we need to cross a buried 24-inch TRANSITE sewer pipe with a heavy traffic load, and I want to compare the pressure against allowable limits.
Jeff
I have a situation where we would like to install completely uncased elements, likely with a full-length bar, to support relatively light compression loads (15 kip allowable). We would use a temporary casing (duplex system) to drill the hole and grout as the drill is withdrawn.
I have been...
In a previous post I described an application where i want to use high strength threaded fasteners connected to a tapped steel plate. Pretty much all the design guidance I have seen applies to bolted connections secured with nuts. This is not my situation.
Is there any screw-specific design...
Note:
**I have already posted this in the Mechanical Engineering Other Topics and Structural Engineering Other Topics fora inadvertently. I will direct replies from those fora to this thread.**
I am working on connecting a planar frame to the counterweight of a heavy crane. The current scheme...
I am working on a project where we need to rehabilitate an existing arch bridge. We would like to better delineate the extent of poor-condition concrete and resteel within the arch member prior to actually digging into it.
I would appreciate hearing about your experiences in using NDE for...
I am doing analysis checks for a HSS beam design where the beam is cantilevered and supported at the fixed end by bolts. The bolts are aligned through the minor bending axis. Stiffeners in the form of steel pipe will provide a sleeve for the bolts. In order to fabricate, a hole will be drilled...
FHWA has finally released Geotechnical Engineering Circular No. 8 into the wild. Get it while it's hot!
http://www.fhwa.dot.gov/engineering/geotech/library_listing.cfm
Jeff
We are completing construction of a new MSE wall that uses panels with a pigment mixed into the concrete. One of the panels arrived on site with a noticeably different appearance (apparently due to residue in the forms from a previous job performed by the precaster).
The panel in question was...
