Comments on: St. Joseph Catholic Church http://mike.texasdomes.com/2008/01/11/hello-world/ seize the dome Thu, 20 Nov 2008 20:29:41 +0000 http://wordpress.org/?v=MU hourly 1 By: mjsouth http://mike.texasdomes.com/2008/01/11/hello-world/#comment-20 mjsouth Tue, 05 Feb 2008 19:29:27 +0000 #comment-20 What size rebar is used? This dome uses #4 and #6 bars. The wall has two number 4 bars 4' apart both ways. The Ring beam, the beam poured on top of the wall, has 5 #6 bars. The Dome will have #6 bars 6" on center horizontally for about 6' up the dome then #4 at 18" on center for the rest. Are hangers for suspended ceiling attached to rebar? No, they are installed after the concrete is sprayed, with <a href="http://shop.monolithic.com/products/tapcon-concrete-anchors" rel="nofollow">concrete screw anchors</a>. They are done this way so that they can be more accurately installed. When spraying cement on ceiling, how do they know when the proper thickness is achieved? In some situations we use pieces of rebar tied in to help measure thickness, but these domes are too thin. Its actually hard for us not to put too much concrete on. By the time that we cover the rebar and get the concrete smooth, we have at least 2.5 to 3 inches Is the concrete spryed on the ceiling mixed differently from regular concrete? Standard concrete is usually rated at 3000 psi. The concrete that we use rates out at about 5 to 6 thousand psi. The differences are that we use smaller aggregate than standard concrete, and a little more cement. For more specific information on Mix Designs, <a href="http://www.monolithic.com/construction/mix/" rel="nofollow">click here.</a> Thanks for the comment! What size rebar is used? This dome uses #4 and #6 bars. The wall has two number 4 bars 4′ apart both ways. The Ring beam, the beam poured on top of the wall, has 5 #6 bars. The Dome will have #6 bars 6″ on center horizontally for about 6′ up the dome then #4 at 18″ on center for the rest.

Are hangers for suspended ceiling attached to rebar? No, they are installed after the concrete is sprayed, with concrete screw anchors. They are done this way so that they can be more accurately installed.

When spraying cement on ceiling, how do they know when the proper thickness is achieved? In some situations we use pieces of rebar tied in to help measure thickness, but these domes are too thin. Its actually hard for us not to put too much concrete on. By the time that we cover the rebar and get the concrete smooth, we have at least 2.5 to 3 inches

Is the concrete spryed on the ceiling mixed differently from regular concrete? Standard concrete is usually rated at 3000 psi. The concrete that we use rates out at about 5 to 6 thousand psi. The differences are that we use smaller aggregate than standard concrete, and a little more cement. For more specific information on Mix Designs, click here.

Thanks for the comment!

]]> By: howard41 http://mike.texasdomes.com/2008/01/11/hello-world/#comment-19 howard41 Tue, 05 Feb 2008 16:45:36 +0000 #comment-19 What size rebar is used in the dome? Are hangers for suspended ceiling attached to rebar? When spraying cement on ceiling, how do they know when the proper thickness is achieved? Is the concret spryed on the ceiling mixed differently from regular concrete? Howard What size rebar is used in the dome? Are hangers for suspended ceiling attached to rebar? When spraying cement on ceiling, how do they know when the proper thickness is achieved? Is the concret spryed on the ceiling mixed differently from regular concrete?

Howard

]]> By: mjsouth http://mike.texasdomes.com/2008/01/11/hello-world/#comment-18 mjsouth Mon, 04 Feb 2008 23:59:50 +0000 #comment-18 This particular job did have a soil test, and the architects specified that we take out a 4' deep, 4' wide chunk of dirt out from under the footing area and replace it with select fill. The select fill had to have a specific moisture content, and is compacted in 6 inch lifts. Thanks for the comment. This particular job did have a soil test, and the architects specified that we take out a 4′ deep, 4′ wide chunk of dirt out from under the footing area and replace it with select fill. The select fill had to have a specific moisture content, and is compacted in 6 inch lifts.

Thanks for the comment.

]]> By: Stoneman http://mike.texasdomes.com/2008/01/11/hello-world/#comment-17 Stoneman Mon, 04 Feb 2008 20:51:15 +0000 #comment-17 Mike, I am curious. Seems like a very shallow footing. Did you have to get a geo-tech report that takes into account the expansive soil found in the Commerce area? Foundation cracking is quite common in the region. Mike,
I am curious. Seems like a very shallow footing. Did you have to get a geo-tech report that takes into account the expansive soil found in the Commerce area? Foundation cracking is quite common in the region.

]]> By: mjsouth http://mike.texasdomes.com/2008/01/11/hello-world/#comment-7 mjsouth Tue, 22 Jan 2008 03:21:00 +0000 #comment-7 The 'uprights' are the pieces of rebar that come out of the footing concrete and will be poured into the wall. The uprights help connect the footing to the wall. The ‘uprights’ are the pieces of rebar that come out of the footing concrete and will be poured into the wall. The uprights help connect the footing to the wall.

]]> By: Steve Attack http://mike.texasdomes.com/2008/01/11/hello-world/#comment-6 Steve Attack Mon, 21 Jan 2008 19:37:29 +0000 #comment-6 What are the 'uprights' referred to in this post? It is interesting to note that your footing is also your foundation wall, and almost at ground hieght. Up here in Southern Ontario our footings would be approximately the same size as yours, but the top of the footing would be about 4 feet below grade. The advantage there is that it gives us about 5 - 6 courses to get the level bang on before reaching finish grade. Like shat I'm reading so far, keep it up! What are the ‘uprights’ referred to in this post?
It is interesting to note that your footing is also your foundation wall, and almost at ground hieght. Up here in Southern Ontario our footings would be approximately the same size as yours, but the top of the footing would be about 4 feet below grade. The advantage there is that it gives us about 5 - 6 courses to get the level bang on before reaching finish grade. Like shat I’m reading so far, keep it up!

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