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Hi, I have bought a 1970s house. There is one basement and 1 story only (it's a bungalow). I am a structural engineer, but I work mainly on heavy steel structures. I don't have much experience with residential homes. I talked with an engineer specialized in residential structural engineer, and...

Hi, I want to bolt a structure to hold a road sign board to an existing W that is part of a vehicule guardrail on the side of a bridge. Bolts have a diameter of 5/8 in. The plate has a thickness of 3/8 in. My client has contacted an engineer specialized in bridges, and he told him that we...

Hi, My post concerns the forces on two types of fences: Architectural Fences What are the standards specifying the design forces to be applied on an architectural fence to block humans? I did not find any, so I was thinking about using the forces for the guardrails according to the National...

Hi, On the datasheet of the electrode ESAB C6M (CWB CSA W48 E491C-6M-H4), it says on the electrode datasheet that the typical Tensile strength is 550 MPa. Would you say it is safe to use this tensile strength for a structural calculation of an existing weld instead of using the minimum of 490...

Hi, I am shopping for a single-family home. There is a house about 50 years old that interests me. However, it has a 5mm wide crack at the front and back. The crack may go from one side of the foundation to the other, but it is not possible to verify this without removing the floor, drywall...

Hi, I have a situation where there is a rectangular hole in a beam. I am working on reinforcing the beam. I have made sure that: - The minimum bolt edge distance is respected. - The minimum bolt pitch is respected. - The bolt resistance is sufficient to resist the point load. - The bearing...

Hi, Does anyone know a reference in which I could find the Plane-Strain Fracture Toughness (KIC) of ASTM A7 steel? I suspect that the "ASTM E399" would cost too much for the scale of my project.

Hi, I want to follow up on this post (https://www.eng-tips.com/viewthread.cfm?qid=498797&action=updated), but with a slightly different question. The assumptions are the following: - Inertiatotal = Inertiabottom_beam + Inertiatop_beam (this was the conclusion of this thread...

Hi! Would you say that corrosion increases exponentially in a steel element where corrosion has started, given the following parameters: - Environmental conditions are constant (humidity, temperature, wind speed, exposure to wind etc.). - The structure is not repaired, not repainted, not modified.

Hi, What would be the equation of the deflection of the two beams stacked stacked on each other? I am looking for the deflection at a distance "a" from the support. Assumptions: - The two beams are not linked to another, they are just stacked. - We can assume that there is no friction. - The...

Hi, I have a road bridge with a simply supported beam. What is the equation for the strain rate of the fibre in tension in the middle of the span caused by a vehicle crossing the bridge? An easy way to determine the strain rate would have been to use the formula developed in this thread...

Hi, I have this beam: Would you say the strain rate (Δε/Δt) of the fiber in tension of this beam would be: Δε/Δt = V / L0 = (0.00583 m/s / 7.11 m) = 0.000972 s-1 Note: The beam will stay in the elastic realm.

Hi, I have a mandate in which there is an industrial bridge for a gantry crane. The bridge is over 100 years old. The bridge is seldom used, so fatigue is not an issue. The bridge is built of A7 Steel with a low fracture toughness resistance (Charpy V-Notch Test Result: 8 J at 0°C). There is no...

Hi, I have received the results of a Charpy Impact Test on a steel beam made of A7 steel. The test indicates that the steel is brittle (8 J at 0°C). My beam is utilized mostly in shear, and slightly in bending. CSA S16-19 31.1.1 indicates that "Brittle fracture is a fracture mechanism taking...

Hi, I have a situation where a Charpy test indicates less than 20 Joules at 0°C for the main beams of an old existing steel structure on which there is a hoist used to lift a single load of 30 metric tons. The crane members are not covered by an envelope, so therefore the structure can...

Hi, Where can we find some information regarding high-toughness welding filler metal requirements and welding filler metal properties at low temperature? I would like to know which filler metal to use at -30°C for a dynamically loaded primary member. Thank you!

Hi! What is the maximum slope angle before it is considered work at height?

Hi! I am used to inspect and calculate any type of steel structures, and I know how to inspect reinforced and unreinforced concrete bridges. However, I don't have much experience inspecting and calculating large masses of concrete such as concrete dams. What are your tips, tricks and references?

Hi! Does anyone have some good references to design dam booms, like in the picture below? In Canada, Dam booms typically need to be removed in fall because of ice formation on the reservoirs, then reinstalled at the beginning of spring. The ice pushes on the booms, destroying them. However...

Hi, I have seen an offer to buy a house built in 1971 that was decontaminated of asbestos in Canada. I have seen several postings of houses built in 1970, without any mention of asbestos. Is it usual to find house built around this time with asbestos? Is this one special because despite being...