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StructuralEIT, Thanks, I appreciate your digging this item up. It helps. I would like to know where this formula came from, looks like a professor obtained it fom some text or study. The great thing about your reference is it also provides direction on a line load across the slab too which is...

Yep. BigH has you covered on the advice. Good Job

200kg/cm2 (2840 psi) is pretty low for concrete in my area (Midwest USA). Most concrete, even if specified to be less, is going to break higher then that. I'm not sure what commonly occurs where you're at but I'd hope you could expect high enough breaks. To eas you mind somewhat, ask the mix...

Thanks for the prompt response. It is much appreciated. StructuralEIT, I would be very much interested in your document. The Australian Code formula is just what I would need, but I can only reference governing codes. I can however, reference published literature and the Westergaard report is...

I have a need to determine a rational effective width for a supported reinforced concrete slab supporting a concentrated load. I'm aware of AASTHO having a method and formula but I'm not familiar with AASTHO code nor do I have access to one. I have heard said that it is based on Westergaard's...

Slide Rule Era, thank you very much for posting the 53' book on historical shapes. regards, Boyd

PSlem, you refered to a text book above. Could you provide the ISDN number? I'm very interested in design examples of conventional cantilever retaining walls supported on piles. PSslem quote: "Try Peck, Hansen and Thornburn for pile supported cantilever wall design. I have designed some with...

The piles I'm working on extend down from the bottom of pile caps whose base is 5 feet below grade. They are completely braced by the soil. Standard output for such a pile from LPile, AllPile etc will provide curves for shear and bending moments when a lateral load is applied to the head of the...

I'm designing some steel pipe piles, an H section may perhaps be used. The piles will restrain some lateral load due to wind. I have obtained moments and shears from a program for an acceptable deflection. My question is how do I evaluate the section for stresses. IBC 2006 1809.3.2 Specifies...

The L shape and C shape of blodgett consider one side only. Often, weld is applied to both sides completely or only a portion of both side with a specified return. Often times welding is applied to the outside of one angle leg and the inside of the other. Weld can also be applied to the inside...

Thank you very much for your response. I actually own a copy. Blodgett is typical of most other texts in that they provide 10-15 formula for common welds. I find that my weld groups can often be beyond the scope of commonly provided formulas. Computing the seciton properties is cumbersome. A...

I am a structural engineer. I often design welds and as such need to identify the section properties of weld patterns. I have seen a publication called "Welding Formulas and Tables for Structural and Mechanical Engineers and Pipe Support Designers" by T.S. Hobert published by I.V.I. Structural...

Sundale, yes, there is such and seismic force-resisting-system and despite other simpler solutions, sometimes the owner just insists on lipstick on his pig. IBC 2000, section 2108.9.6 provides detailed requirements for such a system. The 97 and 2000 editions of the NEHRP Provisions also provide...

I'm designing a stand alone masonry elevator hoist way. Code is IBC 2003 which defers to ASCE 7-02 for Seismic Design. Seismic Design Category = C. Due to windows on the back side and doors on the entrance side, in one direction the shaft functions as a moment frame. ASCE 7-02 classifies the...

What Tech Note from the BIA did you use for designing the through bolt? I'm not familiar with the acronymn BIA, can you please elaborate? Thanks Boyd

I'm teaching myself use of ACI 318-02 Apprendix A Strut-and-tie models. I'm more familiar with designning deep bemas per ACI 318-99 methodology which was specific on beam shear strength and the shear strength of added horizontal and vertical steel. Commentary states that for a B region, to...