Hey all,
I am dealing with a concrete beam on a building that has some deflection (0.5" > 0.469" per L / 480) at the quarter span of the simply supported beam.
I did my calculations and the maximum deflection calculated of approximately 0.25" at the midspan matched what I measured in the...
Hey all,
I am installing some aluminum metal panels on the outside of a building. Note my client does not want the bolts or nuts to show that connect the panel to the building, does anyone know of a good product to cover the bolt head / nut that is used for outdoor applications? I saw caps...
Hi All,
I am working on an old reinforced concrete beam that we believe is from the 1910s. We have no construction drawings or anything to go off of except the field measurements we have gotten so far.
I believe that the first reinforced concrete code was published in 1907, does anyone...
Hi All,
Am dealing with a heavily deteriorated spandrel beam on the perimeter of a building that has seen extensive water infiltration. The water infiltration has exposed the stirrups and longitudinal reinforcement at the underside of the spandrel beam. Additionally, the outermost...
Hey all,
I am working on calculating the capacity of an outdoor, reinforced concrete cantilevered balcony on a high rise. Ultimately I will need to post the balconies based off of an allowable occupancy and an allowable storage load....
I have calculated the capacity of the balcony and...
Hey guys,
I receoently drafted up a conceptual idea I have for a product which will enhance similiar products that are popular in the market. Note I am a structural engineer that designs bridges and buildings but realize that I can apply my skills to general consumer items which I drive my...
Hey all,
I am providing a concrete encasement at the bottom of a steel column to protect the column from the exposure to dirt, salt, etc. Note this will not be structural since I have designed the other components to take the full loads. I used ACI to calculate the required area based off of...
I ran into something the other day and unfortunately don't have access to my physics book right now...
I am doing an analysis on a post where they installed a new speaker system to a railing post. The speaker is very high in the air (big lever arm) and therefore when you push against the post...
Hey all,
I am reviewing a catwalk system where a guardrail is required however, there is an existing ceiling 40" above the top of the cat walk grading and therefore the required 42" guardrail cannot be obtained due to this constraint.
With this being the case, should the guard rail be...
Hey guys,
I recently have been given the task to splice a new glue laminatrd beam to an existing glue laminated beam of the same section and properties for a building in order to accomodate a renovation.
Luckily, the location of the splice is an area where the moment is relatively small with...
Hey everyone,
I am currently on a job acting as a third party QA/QC (basically inspector) and am in the process of driving piles and have been dealing with the designer of the pile system for some time due to very high blow counts. This is not my area of expertise and do not even have any...
Hey all,
See my question above, a colleague and I are going back and forth on the issue. Note my bridge is a through girder bridge with the deck of the bridge lying below the neutral axis of the through girder. Although knee braces are present at the inside face of the girder, I am arguing...
Morning guys,
I am in the process of designing a base plate in LRFD for a guide rail that is bearing against an unknown timber material and am having trouble with compression in the timber on the bottom of the base plate when impacted by a vehicle. The trouble is my compression stress from...
Morning! After I received my PE license I shopped around different companies which included forensic engineering firms due to an ongoing interest in the industry. Note my background is in the construction, inspection and design of timber, concrete, and steel highway bridges in addition to...
Hey guys - I am designing a bridge at a T-intersection and need to bend the guiderail in order to transition the guide rail to the bridge railing which requires turning the guide rail 90 degrees to protect the adjacent road from the embankment.
Bottom line is has anyone out there ever bent a...
Hey all,
I am jacking a girder using a hydraulic jack to fix the respective bearing and due to the jacking load, I have to provide a double angle section at the web of the girder so the web does not buckle.
This is pretty typical for most of my jacking designs, my question is in regards to...
Hi! I was recently assigned to temporarily jack a bridge girder from the toe of footing of an abutment due to constraints on other jacking alternatives.
Note the load (V) is 170 kips and the footing is unreinforced with f'c = 3000 psi. I am using ASD from the AASHTO Standard Specification...
