Recent content by BPres

I'm designing to meet seismic requirements. Yes, Chap. 9 of 7-02 is the same as Chap. 13 of 7-05. Looking at 7-05 Chap. 12.4, I believe I understand for non-buildings, paragraph 12.4.2.3, Strength Design, I would use #5 for upward seismic acceleration and #7 for downward seismic acceleraton. Is...

I'm a mechnical engineer and have designed a base frame to support 8 motor driven components. Per customer I have to design to meet ASCE 7-02, 9.14. I find that in Section 2.0, Combinatins of Loads,equations 2.3.2.5 and 2.3.2.7 are the ones applicable to this case. So, the questions are; 1)...

I want to check for buckling of a crane rail beam. I am using CMAA 70, Section 3.4.8. The first formula uses a buckling coefficient, K (either compression or shear) and referes to Table 3.4.8.2-1. 1) For I beams, is length "a" the width of the flange? 2) For I beams, is length "b" the distance...

I want to use the allowable stresses listed in 3.4 Allowable Stresses for a calculation. However, for clearification, in CMAA 70 the far right column of listed allowables, 3.4.1, 3.4.2, and 3.4.3, is "Allowable Bearing Stress" the same as bending stress?

Sorry for the delay UcfSE. No, the work has not yet been done. I plan on welding 1" thick plates on both sides of the web out at the outside edges of the flanges. The plates will extend about 6" above and below the actual point of bend. This will turn the column from an I beam to a box at the...

As stated above, one flange was dented in approximately 1-1/2" on one side of the web. On the other side of the web the flange bowed out approximately 1". I would have to heat and bend the flange before I could weld a 1" plate over the bent area. What if I welded a 1" thick plate between the...

Very good references. However, this is a column with no easy way to take out of service. I will take the jen4950 advise.

I'm a mechanical engineer and am designing a mechanical component and per customer spec. have to use IBC2000 1621 for seismic consideration. I did the Fp calc and used the calculated Fp for lateral and longitudinal forces to design against. I did not do the 1617.1 "effects" calc. nor the 1605...

We have a large assembly building. At one end we have a 10 ton bridge crane followed in series by several 5 ton bridge cranes. All have a lift height of 21 feet. One of the columns between the 10 ton and the 5 ton next to it was damaged by a fork truck. About 6 inches off the floor. The column...

Great! Please provide me with an email address so I can send you the 3D model or 2D drawings.

Next question is this; if I get the molds made in US I still only want 1000 (14 plastic parts, 5 stamped stainless steel)to start with. Are there shops in US willing to run such a small number?

By all means! Add his point of contact or I can give you my email.

Thanks for your insight. I'll use it for the final decision.

I received a quote for molds made in China for $12,000. Compared to US quotes of $60,000. Is there a sourse which identifies good, bad, ugly in China? Am I asking for problems having them make in China? Is there a cheaper way to have them made in US? By the way, I'm just getting started putting...

I am using 6x13 channel to brace a frame. The channel is braced horizontally between the frame and a concrete wall. I can't seem to fit a C channel into the formulas in ASD or AISC code. Any suggestions?