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Let us forget about the cracks. My client stating that he feels vibrations like a very light earth-quake. What is causing these vibrations? The tiles weigh about 4lb/sf and this is a large area (6500 sf) Is it possible that reducing the dead load could in any way cause any movements or...

dlew: Thanks for your response. The house is located in Miami Florida, was built in 1990 on clean well compacted soil. what about the static force itself, again I am describing it as a free vibration and it is only as a result of the static force. Thanks for your help.

Ishvaaag: What about due to the decrease of load the angular frequency increases, therefore the frequency increases. This is a dynamic case (free vibration) due to static force. This case will cause movement of the second floor. My analysis based on the following: W = (K)^1/2/M IF M (in...

It is a masonry construction, large house about 6500 square feet with a high cathedral ceiling The house was without tiles for approximately 5 months, the Client complaining that after the Contractor have removed the tiles he felt that the house was moving or shaking on a daily basis without the...

I am using Architectural Desktop 2000 and planning to upgrade to 3.3. Is that a good move? are there many bugs in 3.3?

A client claimed that he has noticed movement or kind of light vibration of his house that caused minor cracks on the exterior walls after the roofer has removed all the tiles for re-roofing and prior to the installation of new tiles for a period of 2 months, claiming that reducing the dead...

What about Robot?

I am looking for a good software. I have few on my list and I am hopping that some users respond and help out. Visual Analysis Staad Pro Sap 2000 Robot The Program will be used in the State of Florida.

Using combined footing will not be economical since the spaces available do not lend themeselves to a reasonable rectangular footings (Columns spaced @ 12' o.c.). What about 8"x12" beam connecting edge footing (48"x48"x20") to the interior footing...

I have designed square tubings (4"x4"x1/4") supported by square foundation (4'x4'x20") for a retail store adjacennt to other stores. The Owners of the adjacent stores have refused to accomodate in the construction of the square foundation in which haLf the foundation is...

Ginger You had already mentioned this manual. I sill cannot find it. What do you mean by the Steel Construction Institute? I couldn't find this assiciation. Do you meaan AISC? Can you give me contact information. Thanks.

I will give some directions and just follow it steo by step. 1)Find the load on the joist lb/ft by multiplying the floor load lb/sf with the tributary area of the joist. If the joist are spaced @ 16" o.c. your tributary area will be 16". 2) Now you now the load in lb/ft along the...

This is a sample step by step to calculate pressure on a glazed railing. These calculations use American Society of Civil Engineers Standard 7-93, Minimum Design Loads for Other Structures to compute wind pressures on the railing for 160' heigh building located along the shoreline. General...

I am starting another thread hopping I will get some responses this time. I have been searching for a good approach on the design of post embedment in concrete slab that varies in thickness from 4" to 7". ACI 6.3 discuss this subject but it does not in any way describe a method of...

Kogo Can you briefly explain this section. I do not have this code but I am willing to purchace if this section is related to my question.

butelja I was able to find out how to calculate the center of gravity in AutoCad. Thanks ....

CarLB Thanks I found out the way to do it.

CarLB I followed your instruction. However, my x & y value are based on an origine that I don't know. How do I find the origine for these values. Thanks.

How can I find the center of gravity for a drawn shape in AutoCad?

butelja Thanks for the tip. However I have one question. How do you find the center og gravity for the drawn shape in autoCad. Thanks.