sheet metal term

[grindel]

first off im not a sheet metal guy. what is it called when they stamp the x in sheet to keep it rigid like the photo in the link? thanks
http://beaconac.com/wp-content/galle...-duct-work.jpg

[fireblaz]

cross break its to help stop the duct from bowing in and out when the air handler turns on and of

[grindel]

OK thanks I have a job where I need to get like 25 each. 13x4' bent like that to keep it from rattling in the air

[lstilts]

Most duct that size doesn't need to be cross braced, unless you just like the look if it or unless the metal is very thin. How many cfm of air is going through it, & what gauge metal will it be ?

[lstilts]

I'm sorry, is that 13 ft. X 4 ft, ?, If it is feet it does need to be braced. I thought it was inches.

[grindel]

yes its 13' x 4'

[weldbead]

you might want to read some smacna details...

[Canoe2fish]

13' long in one piece???
in my area, we only stock 8',10' and 12' longs sheets. The long straight runs of duct that I usually see seem to be produced in half sheet sizes - I'm assuming for minimizing waste and to add structural integrity.

[grindel]

This isn't for duct work. My local supplier said he will cut it from a coil.

[fdcmiami]

1. first off im not a sheet metal guy. what is it called when they stamp the x in sheet to keep it rigid like the photo in the link? thanks

http://beaconac.com/wp-content/galle...-duct-work.jpg

OK so far so good.


2. OK thanks I have a job where I need to get like 25 each. 13x4' bent like that to keep it from rattling in the air.

OK he needs ductwork, (that is what is shown in his link) and it is moving air (we assume) and he needs to make 25 of them.

3. yes its 13' x 4'

Much bigger than anything shown in his link.

4. This isn't for duct work. My local supplier said he will cut it from a coil.

Guess the reader will just have to wonder what he's talking about, if he knows.

[grindel]

its for the side of a computer (data module) for transport. ill see what i have for images to explain

[grindel]

here is a photo of a older mod. now they are two of those that bolt together in the middle. ( long sides) you have to ship it in two sections. so a cover needs to be made and bolted to the sides to enclose it. and it needs to be reusable. the sheet that covers the open side needs to be a little more rigid. it will have less support.

[fdcmiami]

sorry insufficient data. however, back to the cross break yes it can be done; there are dies that can be used to stamp the metal or it is placed in a break and done by hand.

you would probably need at least two cross breaks given the size limitations of common sheet metal brakes.

there is preformed sheet metal that has stiffeners in place; maybe look at that. a standing seam arrangment could work also. if it's been done before why not just do it again.

is that the northrop plant in LA? i swear i've been there.

[grindel]

Originally Posted by fdcmiami

sorry insufficient data. however, back to the cross break yes it can be done; there are dies that can be used to stamp the metal or it is placed in a break and done by hand.

you would probably need at least two cross breaks given the size limitations of common sheet metal brakes.

there is preformed sheet metal that has stiffeners in place; maybe look at that. a standing seam arrangment could work also. if it's been done before why not just do it again.

is that the northrop plant in LA? i swear i've been there.

i found a local guy who said 2 breaks per section is best. by standing seam what do you mean? the way the side panels are connected is by rivets on a 4' center line. the open side will not have structure to sucure to. so i cant replicate what is done now for sides. no this is in a phoenix data center

[josephaddison170]

Sheet metal is simply metal formed into thin and flat pieces. It is one of the fundamental forms used in metalworking, and can be cut and bent into a variety of different shapes. Sheet metal is available in flat pieces or as a coiled strip. The coils are formed by running a continuous sheet of metal through a roll slitter.Sheet metal also has applications in car bodies, airplane wings, medical tables, roofs for buildings (Architectural) and many other things.i think this information will also help you.

[Canoe2fish]

Finding a 14' brake might be a challenge

[grindel]

Yes that is the hard part. I will probably have each section done with two cross breaks.