I have landed my first project where the payment is based off a percentage of the total construction cost. How do other engineers verify the actual total cost to determine an accurate final payment? It doesn't help that the project continues long after we are done with our part. I feel...
Does any have any value for the weight of a built-up roof per unit thickness?
I can find some weight (psf) values online for the various plies (3-ply, 4-ply, & 5-ply), but can't correlate this to a "weight per inch thickness" value since there is no direct relation (that I can see) between...
I'm designing an elevated house in a V zone (near the ocean) and typically like to use concrete for the piers & beams since they hold up better to the corrosive environment. Due to other design aspects of the project (connection to frames above) it would be beneficial to use steel beams for the...
I'm designing an elevated house in a V zone (near the ocean) and typically like to use concrete for the piers & beams since they hold up better to the corrosive environment. Due to other design aspects of the project (connection to frames above) it would be beneficial to use steel beams for the...
I'm designing a new residential structure and the architect wants concrete walls (interior & exterior) all the way to the roof. These walls will support beams bearing in beam pockets at mid-height of the concrete wall. I was going to specify that the beams have fire cuts at the ends (similar...
I'm trying to design a new roof system with the Steel Joist Institute specifications, and need to design the connection from the bridging to the wall. However, I'm a little confused on my maximum bridging force is.
-For a 14K6 joist, Table 5.4-3 gives a Pbr = 340 lbs., which isn't effected by...
Greetings,
I work on a fair amount of projects that require wood shoring boxes for pipe trenches, or removal of contaminated soil. I typically specify eastern white pine or him-fir for the 3x10 t&g sheathing and 8x8 wales/struts. Once it has served its purpose we backfill the pit/trench with...
I am designing a 3 story, single family structure out of wood and the client wants a 12' weather tight bridge at the second floor level to connect to an existing 2 story structure. Does anyone know of a method of seismic isolation that would not expose the climate controlled interior conditions...
I won't bore everyone with the pointless story of how this came up but someone told me I was pronouncing pilaster incorrectly today. I've only ever heard it pronounced one way and that is "PIE-LASTER" she was telling me that another engineer "corrected" her when she pronounced it this way and...
I have a condition where a dock is going in and the piles were specified by the civil to be embedded 10’. While driving the hollow 14” diameter fiberglass piles the contractor hit ledge at 3’-5’ depth. The contractor wants to drill and socket the piles into the ledge, then fill them with...
Does anyone know what exactally is the difference between Steel "Special" Moment Frame, & Steel "Ordinary" Moment Frames. I know there are various stipulations to qualify one as special, but what are they, and where can I find them?
Thanks
I need to reinforce existing rafters for the addition of solar panels. The simple solution of sistering another rafter along side the existing one isn’t an option due to confinement issues of the attic access (rafter is too long to fit).
My solution:
Attach a Simpson coil strap “CS14”...
My copy of TIA 222 "Structural Standards for Steel Antenna Towers" is missing Annex B: U.S. County listing of Design Criteria.
Does any one have this standard that could make a copy or pdf of this table for me? The full table would be nice, but the couple of pages that the Massachusetts...
Is anyone aware of published loads for tension & shear of a self tapping screw into aluminum similar to the ones available for screwing into steel?
I'm trying to avoid the redundant calculations pull out, pull through, etc. Any suggestions will help.
Thanks
Sorry for the redundency of also posting this question in the earth retention forum, but this is pretty urgent situation.
I have a cast in place foundation wall located 4' away from the edge of excavation which is a vertical cut 10' deep. OSHA wants the inner forms braced incase the soil gives...
Trench cave in impact Foundation forms.
I have a cast in place foundation wall located 4’ away from the edge of excavation which is a vertical cut 10’ deep. OSHA wants the inner forms braced incase the soil gives way, and caves the forms in.
Obviously the best approach is to retain the...
I'm using the dead load of a soil cone that would have to be displaced by a helical pier (soil auger) in order for it to be pulled out. I have reduced my net uplift by 60% of the dead load per ASD load combinations.
My question is, do I also have to account for the 1.5 overturning F.S., or...
I have to design a single post support for a solar panel which is essentially a 10'x14' sign that is tilted 45 degrees. I’m torn between ASCE 7 section 6.5.14 “wind load on a solid sign”, & section 6.5.13 “monoslope roof”.
Sect: 6.5.14 (solid sign) doesn’t account for any uplift resulting...
I have a tube steel (3x3) that was hit and bent (1" max) by a car. It will be a REAL hassle to replace it due to the trim and siding of the building so the contractor would like to salvage it if it's possible. Since there is not much load on it I told him I'd see what I can do. Does anyone...
Does anyone know of a reference (book / website) that will assist in determining the age of a structure by the methods and materials used for construction during a given time period?
i.e. there is a rubble foundation so the structure was likely built before the 1940's
or for a much simpler...
