I'm looking at existing drawings for a building that was designed in 1957 and they have a note that all joists shall be 10LB15 which i'm assuming is a W10x15 but I'm not sure. I did a good deal of searching for this designation but couldn't come up with anything. Any help is greatly...
I have been tasked with designing a small pedestrian bridge with Merbau wood. I have to admit, I've never heard of this specie of wood and can't seem to find its properties. I have searched extensively but didn't come up with anything useful, so any help as to the design properties of Merbau...
I am being tasked with coming up with a solution to repair a post-tensioned slab that has exposed and corroded tendons. The slab is 8 inches thick but I know nothing about the reinforcing / tendon location...etc. There are no existing drawings anywhere even in the city records, so I'm on my...
I just noticed that the 2012 IBC eliminated all the nail fastening values from Table 2306.3(1) and now only includes staples which have smaller shear values. Does anyone know the reason for this change or if I'm missing something? Is there a different table for values of nailed panels that I'm...
I got a picture of this joist from a client on one of my potential projects and was wondering if someone could shed a light on what kind of joist it is. I don't have the job yet so I can't take measurements or try to find a joist tag, I'm just trying to get an idea of what kind of joist I'm...
I have always specified Hilti fasteners to attach deck to galvanized beams, but I've been asked if puddle welds could be used instead. My thought that it's harder to puddle weld to galvanized steel than it is to use the Hilti fasteners but the fabricator is telling me otherwise.
Any thought on...
I am designing a 3-story building with a large roof overhang. I have two major girders cantilevering 40 feet and pick up infill beams. Since the roof has downward dead load and snow load, as well as upward wind load, do I need to consider load reversal and design the connections of the beams...
I would like to know if it's possible to make plumbing openings in the flange of existing Double T's. The openings will not exceed 12" in diameter and can be located anywhere in the flange.
I realize that I need to engage a precast engineer but we're in the early stages of the analysis and I...
I am designing a military facility and noticed that UFC 3-301-01 with change 2, adopts the IBC 2009 while the UFC 3-310-04 (Seismic design for buildings) still references IBC 2003. Does this mean I have to design to two different versions of the same code? or am I missing something? Any help...
Could someone please enlighten me on when and how to actually use the Design Response Spectrum Curve shown in figure 11.4-1 of ASCE 7-05? Section 11.4.5 indicates that "Where a design response spectrum is required by this standard and site specific ground motion procedures are not used, Design...
I am working on the design of a one story building with a Seismic Category D and a 4:12 roof pitch. I am using Intermediate Steel Moment Frames, however, since there are no prequalified sloped Intermediate Moment Frames, my thought is to use a typical Intermediate Moment Frame (i.e. not sloped)...
I am looking for any helpful information on the design grade beams. Are they typically designed like a typical concrete beam that is continuous over the pile caps, or are there any other considerations I need to look out for?
Any help would be greatly appreciated.
I am looking for information on "Cladding" or adding stainless steel sleeves to reinforce existing pipe columns.
I am evaluating a 50+ year old building in which the use of Caustic material has corroded many beams and columns. There are dozens of columns with various stages of corrosion /...
I am designing a one story building with tilt-up shear walls and LW composite roof deck for blast resistance. My question is: since I have a concrete filled diaphragm, do I still need to design the perimeter angle for the chord force or is the concrete diaphragm so rigid that the perimeter...
Hi,
I would like to know if needling is a good method of shoring CMU walls, or if there are any other proven methods? Also, what is typically used for needling? I.e. tubes, wide flanges, pipes?
I have a wall with a large (4 klf) and I am concerned that needling may not be sufficient to shore...
Hi,
I would like to have some opinions regarding the use of T111 sheathing in shear walls. Also, what shear design values would be appropriate for use with T111?
Thanks in advance.
Hi,
I have to design a steel beam as a favor for a relative who lives in London, but I'm not familiar with the British steel beam designations. I need the British equivalent designation of a W8x15 or a W8x18. Any help would be greatly appreciated.
I would like to know whether I should specify HIB-91 or BCSI 1-03 for a guideline to truss handling and bracing. Does it really matter which one to use? Is one stricter than the other? Thanks in advance.
I would like to know if there's a rule of thumb on what the structural engineering fee is in relation to the square footage of the building. I know that it varies with a lot of factors such as complexity of the job and the scope of services, but I am just looking for a starting point to help me...
Hi,
I have a client who wants to add a second floor to an existing metal building. However, the existing metal frames need to be raised about 5 feet in order to allow for adequate headroom. The frames consist of wide flange constant width columns, and tapered beams that frame over the columns...
