Proposed increased loading on an existing structure overstresses columns by about 25%, (combined axial and moment). Existing loads will remain while reinforcing plates are welded to flanges. Is there a special formula for designing reinforcement to ensure that an adequate portion of the new...
I'm looking for industry-accepted standards with regard to installation of underground piping. Does it depend on the piping material or intended contents? Are there widely accepted standards, or do individual companies write their own? Thanks.
Does anyone know whether the use of "slagcement" (ground granulated blast furnace slag), would reduce the corrosive effect of molten sulfur on (sunken) concrete containment tank, or would have benefits with regard to cracking as a result of the temperature differential between molten sulfur...
New information indicates the temp will be higher than I thought; about 300 degrees F. The pit is for liquid sulfur. It seems the main concern is crack control, so leakage of groundwater into the tank is avoided. (Sulfur solidifies at temps below 238 degrees F. so leaking out is not a...
Are there significant effects on concrete wall design for containment of high temp liquid, (mostly water)? I don't have specifics yet regarding what temp, I'm guessing between 100 and 200 degrees F. The pit or tank is in-ground, designed somewhat like a cantilever retaining wall. Size of tank...
UcfSE,
Thanks for your post, though I don't know how a quantitative check of the grating would help me determine the allowable bending stress of the beam, which is currently the limiting factor as it is not braced against lateral displacement. (I know the meaning of the word "quantitative", but...
Unbraced beam governs max live load at about 40 p.s.f. Grating deflection would otherwise govern at about 140 p.s.f. Adequately braced beam would potentially exceed grating capacity.
Thanks to those who responded. I should have also mentioned that this is an existing platform and obstructions, (piping), prevent adding steel for bracing. We are trying to maximize allowable live load by using existing grating, (currently not attached), to restrain support beams against...
A provided geotech report states that "Bearing capacities may be increased by 1/3 for transient loads, such as wind loads." (Transient defined as temporary loads of limited duration). ASCE7-05 states that "Increases in allowable stresses shall not be used with load combinations given in this...
Wire mesh was installed as safety net for overhead conveyors. It has since been used by workers as a service platform. The plant has asked us as consultants to determine allowable live load for assurance of worker safety. The wire mesh manufacturer is not forthcoming with info - as was...
I have ASCE 7-02 which reads "Unless otherwise specified, the indicated concentration shall be assumed to be uniformly distributed over an area 2.5 ft square and shall be located so as to produce the maximum load effects in the structural members." My particular situation falls under "otherwise...
Side note: Table 3-18a in Steel Manual gives moment of inertia per one foot of width, not one inch - a minor correction to the contribution by brane23.
