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Hi AnaAnt, I agree with Hokie66 that the bearing capacity will not be an issue as the entire slab (including beams) is spreading the loads. I have also designed several buildings with raft foundation and they have performed optimally for over twenty years. First to deal with your question #1...

I worked on a project last fall into winter and these were used at spacings of 6000mm in cased auger piles. Regards

We combine the AASHTO's guides for pedestrian bridges and section 3.8.9 of Canadian Highway Bridge Design Code, CAN/CSA-S6-06.

I agree with JAE that the design be qualified an full disclosure regarding the necessity for removal of the cover during the times agreed. Good luck

Hello All, if I am not mis-interpreting the sketch, I think the new footing will be just at the edge of the old footing and above the old footing? If this is so, my thoughts will be to excavate the new foundation to the base level of the old footing (with 45deg sloping out), and fill with...

A principle of using fibrewrap link; this information may be of use to you and be a starting point for your design, http://www.iiees.ac.ir/iiees/publication/Jsee/jsee15_3.pdf We use this pretty often on bridge structures built over many decades ago so as to get some more service life from them.

Designing the structure with pilaster columns within the tank will be a very Safe option, I will rather add tie beams probably with gratings and walkway to connect the columns. On the wall design, the wall will have hoop stresses (compression and Tesnsion for load cases) better to modelthe...

Hi apsix, To give this a shot;my responses in CAPS I'm assuming that there will be some vertical movement as the tanks are filled and emptied. THERE WILL BE MOVEMENT BUT IMMEDIATE WILL BE PRETTY HIGH AND LONG TERM CONSOLIDATION WILL BE VERY INSIGNIFICANT ( so do not worry). The tanks are...

Hi IHCal, See "CSA S6-06 Highway Bridge Design Code" for reference and the attached pages will give some information on the loading. Please use the CL-800 i.e. 800kn as the total semi trailer load. Regards...

Hi Okey1, As per books and references you could also read up design principles in "foundation design' by Tezaghi and Peck. Bowles Joseph also has a discussion on the Bossineq method too. From experience I want to advice that you model this in some structural analysis program if you got access...

Some impact resistance is required in parking lot light poles but i wouldn't worry about this as the speed of vehicles usually very very low. This impact force can be taken by the rigid bolted connection at the base plate to forestall the pole breaking and damaging opposite and adjacent...

agallag, BAretired has made the explanation very simple and I designed this situation of reactions for a few electrical street light poles with stub columns at about 1.5m high from foundation base. Thanks BA. Lexim

INFORMATION CAN BE OBTAINED FROM THE LOCAL METROLOGICAL DEPARTMENT AT ONIKAN, LAGOS. AND YOUR REFERENCE OF LOCATION WILL DETERMINE THE EFFECTIVE PRESSURE YOU MAY REQUIRE FOR BUILDING DESIGN. FROM EXPERIENCE V.I. IS ABOUT 47 - 60 KM/HR (VERIFY?)

Hi, A good reference book is " Reinforced Concrete Designer's Manual" by Reynolds & Steedman. An excellent book. Lexim

Hi jvolk, From an investigation point of view i.e supporting either side of the beam where the inspection is to be carried out. An elemental width of the concrete beam may be chipped off to the top of the bottom flange and also at the side of the concrete beam(at a position). The width and...

TampaBridgeDesign, I work at a bridge design firm in Alberta and a conservative truck load used for design on higway is CL-800. A typical guide to your desgn can be found in the below link. Good luck. http://www.transportation.alberta.ca/565.htm...

Your thoughts are good on the proposed solution especially the flexcell is very important to check any vertical movement. This movement could generate fatigue shearing stresses at the notched ends as the slab transfers some reaction to the existing building.(Right??). So I would check the...

I assume you are having a deep slab section or a concrete slab supported on beam and anchored into the column. This will be my option. Having a space to locate a column for you to have one end rigid and the other end free is wise, and isolating the free end to move in the direction of crossing...

Remember to check the Bending Moment cased by teh uplift force on the top of your footing and provide appropriate reinforcing there. Also check for punching shear on teh large load and a pull out resistance on the uplift force. Lexim

Hi Monopoly, I have been involved in a number of bridge constrcution employing an enoumous number of H -Pile and the recommended embedment should be 300mm or more (Canadian Highway bridge design code clause 6.8.9.1) Embedment in footing Where the heads of piles are encased in a concrete...