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Fellers, I looked at 2 4" diameter basement columns in a new house and the screw portion which allows adjustability is at the bottom of the column on top of the basement concrete slab. My engineer friend thought that if the screw was in the bottom position then it must be cast within the slab...

What criteria do I need to meet for this classification? The code calls for all masonry to be special inspected so I thought this is what I need. I am trying to get the R value for seismic above the 2 value for just ordinary reinforced masonry shear walls? thanks

Fellers, I need to replace a 24"x20" section of a precast roof panel that was damaged above an elevator shaft. The panels span 8', are 24" wide with 3-1/2"x3-1/2" ribs at the edge of the panel and are 1.25" thick in the center. There is a small 4x4 mesh in the center of the 1.25" middle...

Fellers, in 1990 from ACI the load factors were 1.4 for DL and 1.7 for LL, am I correct that now these are 1.2 for DL and 1.6 for LL? please verify

Fellers, I have a 110 year old brick exterior agriculture building being remodeled into commercial space. We are removing a few interior timber columns and spanning a W18x55 steel beam on the exterior brick wall consisting of 3 wythes of brick. The brick is in good shape and is supporting the...

Fellers, I thought there was a free excel spreadsheet or software that would calculate all the wind loads per ASCE 7, can someone post the link for this? thanks

Fellers, for a lapped Z roof purlin does the ss roofing brace the top flange? It is screwed into the purlin and the ss roofing is not considered as a diaphragm but i believe it does brace the top flange of the purlin?

Fellers, i am looking for a good program that would let me design tilt wall panels with openings as shearwalls and load-bearing. Up to 4 stories in height. What are the better programs for this? thanks

Fellers, hopefully a simple question. I have a 6" metal stud wall @ 16" oc with EIFS, what would be the weight of this system. I usually use about 10 psf but i'm thinking this is high.

Fellers, I am designing a 3'-3" thick machine foundation pad. The pad is large enough where the 92,000 pound milling machine comes to about 1200 psf overall. The loading is not great but am I to use rebar reinforcing at a minimum amount based just on the 3'-3" thickness? I am going to show...

Fellers, When we design elevated slabs for an office bldg we always use a nominal thickness for the concrete slab such as 4", 4.5" or 5". I've seen other dwgs for floors like this where they use 5-1/4" total slab thickness. this requires the use of a bent plate on the perimeter which is much...

Fellers, looking of the shear strength of the screw itself, regardless of material thickness

Fellers, I'm a structural engineer and design simple retaining walls for soil. I need to design a 10' retaining wall for the storage of granular tri-aluminum hydrate. The density is 63 pcf, what equivalent fluid pressure should i design the wall for. This is similiar to storing salt for use...

Fellers, i am designing a concrete base/pad for a 1.5 million pound digester that is 24' in diameter. The tank is flat bottom bearing so it is about 3300 psf pressure. we will have 3500 psf soil allowable. What issues do i need to consider for designing the concrete pad since the pressure...

Fellers, I am exploring all the different ways i can eliminate an interior post supporting a multi-span W8x18 beam in my basement. I've looked at placing a HSS 5x2 inside the web and adding a plate to the bottom. On one side of the beam is the supply duct so i can only get to one side or just...

Fellers, I am working on a project with a large beautiful barn built in the 1890s. A floor system is supported with concrete sitting on small steel beams spaced at 4'-0 which are supported on steel girders about 15' long. Would these beams be a hot rolled shape or a welded built up plate...

Does ACI list a minimum f'c value for concrete footings?

Fellers, I am designing a containment control system. It is all concrete inside an existing building measuring 8" deep, 70'-8" long x 23'8" wide. The SOG is 8" thick and we will place rebar 3" from the bottom. We need the concrete SOG not to crack. We will add wwf mesh in the top and...

Fellers, i am designing a simple weld using 6061-T6. I usually use 70 ksi yield strength of steel material for welds, what is the value for aluminum welding? thanks

Fellers, I want to clear something in my mind. We do mostly low seismic projects in the midwest. If we have SDC A-C are we required to use the Cd and the overstrength factor in designing our bracing connections for steel framed buildings? I am reveiwing the Seismic revisions and it states...