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  1. Inzynier

    Borosilicate Blocks for Chimney Liner Retrofit

    I am somewhat puzzled - which are the competing brands?
  2. Inzynier

    Borosilicate Blocks for Chimney Liner Retrofit

    I am looking for information on manufacturers of borosilicate blocks commonly used for chimney liners. The only product I am aware of is Pennguard block manufactured by Hadek. It is an excellent productr, but some of our customers ask for alternate sources. If you are aware of other producers...
  3. Inzynier

    Good Structural E-library?

    Kevin: http://www.techstreet.com/cgi-bin/detail?product_id=41705 If you need a publication, take advantage of available technology: Step 1: Go to Google Step 2: Using advanced search type title e.g."Metric Practice for Structural Steelwork" Step 3: Review 131 or more returned results -...
  4. Inzynier

    Pedestrian Bridges Reduced Live Load

    AASHTO Guide Spec for Design of Pedestrian Bridges allows for live load reduction if deck influence area exceeding 400 psf. This reduction is allowed for design main structural members. The reduction formula is reasonably based on reduced probability of large influence areas being loaded to...
  5. Inzynier

    Auger Cast Piles

    I have to disagree with lllatin's comment that "any contractor will be comfortable with whatever cage the designs calls for". That may be the case in those regions where ACIP piles are prevalent type of deep foundations.... The real issue is - why design engineer would select a full length...
  6. Inzynier

    Auger Cast Piles

    All: Great discussion. [thumbsup] Here are my questions for experienced participants of this forum: 1)Are there any practical limitations for the length/diameter of reinforcing cage? DFI spec Sec. 1.3.indicates that piles with slenderness over 30 require experienced design professionals and...
  7. Inzynier

    Snow loads in Poland

    In order to determine local building code requirements for snow loads in Poland you need to obtain the following document:PN-80/B-02010 "Obciazenia w obliczeniach statycznych. Obciazenie sniegiem " . This document can be ontained from Polish Commitee for Standardisation, i.e.: Polski Komitet...
  8. Inzynier

    Integral Bridge Design

    Ujiell: Here are few pointers: 1)For integral bridges with steel superstructures, you can download a publication "Integral abutments for Steel Bridges" which is available from this site: http://www.steel.org/infrastructure/bridges/index.html 2)Continuous and Integral Bridges...
  9. Inzynier

    Long Span Wood Trusses

    In this particular case, project requires scissor truss spanning 95 ft over a church assembly hall. The architect insists on wood truss because of its "visual appeal". The scissor truss could be shipped in two components 42.5 ft long each and spliced on site at the center. I am not...
  10. Inzynier

    Long Span Wood Trusses

    I am looking for references or examples of project application of long span wood/glulam trusses (US experience preferred). My current project involves roof trusses spanning nearly 100 ft over assembly hall. It probably can be done but I am personally not familiar with wood roof trusses exceeding...
  11. Inzynier

    Design by rule of thumb

    Greetings! Here are my rules of thumb for structural engineers and not only: 1) It is better to find approximate solution to an exact problem than to find an exact solution to approximate problem. 2) Instead of learning tricks of trade - learn the trade!
  12. Inzynier

    Pre-boring for HP piles vs. soil-pile properties

    1) How to account for reduced capacity of steel HP pile, which is inserted into prebored hole to minimize driving resistance? Preboring or pre-drilling is used frequently on bridge projects to facilitate installation of steel piles in fills or hard clays. Piles are inserted in holes prebored to...
  13. Inzynier

    Concrete Slurry Walls

    I am looking for recommended details of joints between individuals panels of concrete slurry walls. The project involves 150 ft deep, 60 ft diameter shaft. Concrete slurry wall is one of the contemplated options. However panel joint integrity and groundwater leakage into the shaft is a major...
  14. Inzynier

    Joints Between Panels of Concrete Slurry Walls

    Presence of ground water on the soil side of concrete panels (approx. 80 ft abpve the bottom of the shaft). is the cause of our concern. We are considering using CWS (Couffrage avec waterstop) jonts patented by Bachy Soletanche. However, I am not aware of any recent applications of CWS in the...
  15. Inzynier

    Joints Between Panels of Concrete Slurry Walls

    I am looking for recommended details of joints between individuals panels of concrete slurry walls. The project involves 150 ft deep, 60 ft diameter shaft. Concrete slurry wall is one of the contemplated options. However joint integrity and prevention of groundwater from leaking into the shaft...
  16. Inzynier

    Glulam Connections

    Ron, DaveKing: Thanks for your suggestions. These are excellent books indeed. It appears, that our selection of reference materials on glulam and heavy timbers is quite limited when compared to other building materials.
  17. Inzynier

    Glulam Connections

    I am looking for a good reference on design of heavy glulam trusses, with particular emphasis on connections design. The APA guides are OK for conventional trusses, but they seem to have limited resources for heavier, customized design. Any suggestions are welcome.
  18. Inzynier

    States and Counties

    OK, now I get it! We used bjdesign as a map source - try this link http://www.bjdesign.com/USAdirectory.html. I hope it will help.
  19. Inzynier

    States and Counties

    Excuse me, but it is the "pre-detailed" part which I don't get it. Are you looking for library of details and drawings available from various states/county internet sites?
  20. Inzynier

    States and Counties

    Qshake, Pardon my ignorance - what do you mean by pre-detailed states? Ar you refering to library of details?

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