We are having a discussion in the office about what should be included in typical base scope structural engineering services for a new building. For example historically we have not included in our proposals the design or detailing of interior partitions, typical stairs, handrails, or typical...
Good article on this topic: "investigating and repairing wood bowstring trusses", by Richard J. Kristie and Arne P. Johnson, February 1996 "Practice periodical on structural design and construction", published by ASCE. The change in wood tension allowables as well as other factors to...
A welder has substituted an e7014 electrode for the specified e7018 (low hydrogen) electrode for welding new A36 steel to existing gr 30 (older) steel. AWS A5.1 shows that the E7014 and E7018 have similar strength properties but the E7014 has no charpy v notch limits, unlike the E7018. Also...
Irene as an alternative you could also use a "self tapping" screw. These require the extra step of predrilling but can be used with thicker pieces and may still can be less costly than field welding. The contractor needs to use the correct, exact predrill bit diameter, as required by the mfgr...
Thanks for your replies. Yes I am trying to eliminate field CJP. Using an extended end plate (The plate runs several inches above and below the cantilever beam top and bottom flanges) gives me a greater "d" as in "M/d" and eliminates need to stiffen existg column flange. Kootk I thought an end...
Two questions- First, is anyone aware of research and/or a design method for an extended or flush end plate conn that is welded to the supporting column rather than bolted? The AISC design guides 4 and 16 address only field bolted end plates. I have not found anything further on the web for a...
Jacking can work, but doing it slowly is key, and as others have noted you will need to stiffen the jacked floors so that they do not simply return to pre-jacked shape after removing shores. You can monitor the force in your jacks with pressure gauges (I have used hydraulic jacks with such...
I am trying to determine the fire rating and uniform load capacity of an old roof deck system called Pyrobar. Need to replace damaged portion of it on a flat roof of an old building. The roof deck consists of a flat deck of 3" solid Gypsum planks 1' wide and 3' long supported by doubled light...
Eric- An article that may be of some use was published in the ASCE Practice Periodical on Structural Design and Construction in Feb 1996 called "Investigating and repairing wood bowstring trusses". Its still available from the ASCE online. The article includes a discussion about how allowable...
Seeking any span tables or manufacturer's data for this outdated roof deck system. The typical system is 2" thick by 15" wide planks with sheet metal edges. The web says a system like this was made by USG, but no other data available so far. Am evaluating an existing roof that was constructed...
I am designing a replacement parapet as a 4' vertical cantilever. Architect wants us to use solid clay masonry two wythes thick with hor joint reinforcement. I need to provide vertical rebar reinforcement, centered in the parapet, to resist wind etc. Have heard several different ways to provide...
You need a "Brick and Tile Engineering Handbook of Design" book, by Harry C Plummer, published by structural clay products institute. My copy is from 1950 but I beleive there are earlier versions.
It has load some load tables and structural data.
Regards
