6"x16" hollow claytile weight 1

[WWTEng]

This is my second question of the day regarding 1961 construction. I am looking at some existing concrete joists infilled with 6"x16" hollow clay tiles. Google search was not helpful and we don't have older books in our library. So if you know the weight, could you please share it here with me!

Thank you.

 

[SlideRuleEra]

WWTEng - Believe that I have your answer:
Weight of 6" deep flat tile: 26 PSF
Weight of 6" deep segmental tile: 30 PSF

My current scanning project for

http://www.SlideRuleEra.net

is the 524 page, 1934 Carnegie Pocket Companion (better have a BIG pocket ). I'm only up to page 319, but for your question skipped ahead to the Structural Clay Tile section (pages 360-373). Have put the .pdf of these 14 pages on my website. Here is a direct link to the 1.6 MB file:

http://www.slideruleera.net/CPC-1934-Structural-Clay-Tile-360-373.pdf

Take a look and see if this is what you have encountered.

Also, you may want to peruse the website, thanks to the contributions of numerous Engineering Tips members you can download your own fairly significant library of older technical references.

http://www.SlideRuleEra.net

http://www.VacuumTubeEra.net

 

[WWTEng]

Slide, thank you so much. This website is saved to my favorites but for some reason more then half the time I forget to check it out. Need to frequent it more.

 

[concretemasonry]

WWT -

You may be looking at a floor system that is used with a thin concrete topping to create a composite system that is amazingly rigid with less deflection but still weighs as much. - It has been used for decades in many areas (with local dimensions and configurations) and the filler block have been clay tile, concrete block, AAC and even wood fiber/shred blocks.

Beams were set quickly with little special equipment, the special shaped fillers placed and the topped with concrete and the beams supports removed in a day or so.

The system is commonly referred to a structural floor filler system.

Dick

Engineer and international traveler interested in construction techniques, problems and proper design.

 

[WWTEng]

CM, thanks for the input. I have the concrete joist rebar info. Having run the numbers on the joists it appears that they, without any composite action, are adequate for 50+ psf. But I'll post part of the drawings and may be you can take a look to see if its composite system.

In my case, they are providing 16"x42" duct opening in between the joists. Both openings are near each end of the joist which is about 17' clear span. I have determined that the joists are OK in bending but a little over in shear so I am recommending reinforcing the joists with a steel angle for shear only. The angle is connected into the beams at each end and intermittently into the side of the joist.

 

[WWTEng]

CM, btw the joists and concretes are all concrete not steel. A few months back I did come across a composite system with claytiles and steel beams but it also had some steel tension rods for arching. I don't believe that this current system is composite. But I will post portions of the drawings, if you could take a look it would be v helpful

 

[concretemasonry]

WWT -

I would like to see the drawings of the system and where (country) the construction is located.

There are many different systems world-wide, but generally, they are European influenced and different filler materials depend on local materials (AAC, clay tile, lightweight concrete, wood products, etc.) and the shapes and sizes of the filler vary widely to match the locally prestressed beams/joists sizes and configurations. Usually, the beams are set and then temporarily supported before the fillers are placed and the concrete is placed to insure composite construction. The shoring is removed quite soon (2 days to 14 days later) depending on the structure. In most international applications, the engineers have more direct control over the actual construction than in the U.S.

Openings are a problem since the most successful systems are used in areas where the conduits, heating pipes are cast into the system or in the integral 2" topping to create an 8" nominal floor thickness (beams/joists are 150 usually mm deep).

Dick

Engineer and international traveler interested in construction techniques, problems and proper design.

 

[WWTEng]

CM, attached please find the existing drawings. Not sure if its legible but this is the best scan I could get.

 

[WWTEng]

I am between column lines 6 & 7 south of G.