Thanks for the reply. I'll look into Malone. I didnt think to attach a sketch before but you inspired me. Here's the configuration. The house is wood frame single story on full cmu foundation. On shoreline in 120mph zone...
I've been asked to look at a design for a residential wood framed building that is configured in a U shape with straight legs on approximately a 12.5d angle out from center. Middle section between the legs is approx 18' long with legs at about 24' long. middle section has a 16' opening for...
thanks for the reply. to clarify, the tower is 45' high, not the blade diameter (its a small residential turbine - can produce up to 60kwh/day if 20kts winds are steady). I would think the problem is still the same. I'm looking at if the modifications to the tower could have caused the...
I have a client with a 45' wind turbine on a residential property. It has had a high pitched hum that was bothering the homeowner and neighbors so the home owner installed acoustic foam on the tower in an effort to dampen the noise. While it did help quiet things down, the tower has started...
thanks for the advice/references. for A36 - I initially designed for a992 but looked at a36 just to be conservative. The property owner has already differed to the steel but I'll still look at the aluminum just to see how the members compare and for future reference. I'm all for having as...
thanks for the responses and good ideas/references. the area is open in many locations however some is within conditioned space. My first and primary recommendation to the property owner was painted steel (didn't think about up-sizing - good idea CEL). The property owner simply wants to know...
I have a beach front project that requires I beams to support the first floor above and open basement. The floor is residential space over a 4" concrete floor so I'm using 50psf dl and 40psf ll. I've sized it for a w8x15 A36 steel beam. Due to the corrosive atmosphere, steel is not a...
Came to terms with the supplier. The issue was a too much admix that has substantially delayed curing (56 day break at between 3k and 3.6k). Thanks for the input.
thanks for the replies and info. No fly ash was used. The slab is being poured in several sections and the second section, with the same (supposedly) mix, had a 7 day strength of over 4k. It seems clear to me that the mix was off. I'm not as concerned as to the why right now as I am with the...
I've got a large concrete parking lot pour. The concrete is supposed to be 4,000psi with fiber reinforcement and general specs in accordance with ACI 330.1-03. One slump test and one set of cylinders were taken for each 50yds. Cylinders had a 7 day ave of 2,160psi and 28 day ave of 3,355psi...
