Hi Rise Bldg

[Alwayslearningelec]

For a nw constuction hi rise building which the slabs are poured in place are the stairwell landings not poured in place and already pre-cast? Not sure of differeent in NYC than other areas. Thanks.

 

[masterinbama]

Differs from job to job. You need structural and architectural drawings for your particular project.

Sent from my LML211BL using Tapatalk

 

[gadfly56]

The job I'm currently on, the stairs are sub-assemblies dropped in place.

 

[Alwayslearningelec]

The job I'm currently on, the stairs are sub-assemblies dropped in place.

Yes I've of that before but what exaftly is that? A portion of the stair is already fabricated?

 

[infinity]

What type of construction, all concrete or steel structure?

 

[Alwayslearningelec]

What type of construction, all concrete or steel structure?

Not sure at the moment. Why does it matter for the stairs? Thanks.

 

[infinity]

Not sure at the moment. Why does it matter for the stairs? Thanks.

Steel buildings have concrete filled steel stairs, concrete buiiltings usuallly have poured concrete stairs.

 

[Alwayslearningelec]

Steel buildings have concrete filled steel stairs, concrete buiiltings usuallly have poured concrete stairs.

Thanks. What do you mean by concrete filled steel stairs? The stair landings are made of what?

 

[infinity]

Thanks. What do you mean by concrete filled steel stairs? The stair landings are made of what?

The stairs and the landings are metal pans which get filled with concrete. This is before the concrete is poured.

 

[Alwayslearningelec]

The stairs and the landings are metal pans which get filled with concrete. This is before the concrete is poured.

Ah, nice pic. TY!!! So running conduit vertically trhough these stairs requires coring/penetrating?

 

[augie47]

If its a highrise stairwell you better check applicable fire and building Codes. There are tons of restrictions.

 

[infinity]

Ah, nice pic. TY!!! So running conduit vertically through these stairs requires coring/penetrating?

Yes but it's only a few inches of concrete and the metal pan. For poured concrete stairs we put sleeves in before the pour.

 

[Alwayslearningelec]

Yes but it's only a few inches of concrete and the metal pan. For poured concrete stairs we put sleeves in before the pour.

So to be clear you only need to cut through the stair landing to set the sleeve? What do you guys use to get through the metal/steel stair landing? Core drill bit.

 

[infinity]

If the concrete is poured we use a core bit, if it isn't a hole saw can be used to cut through the metal before the sleeve is installed.

 

[Alwayslearningelec]

If the concrete is poured we use a core bit, if it isn't a hole saw can be used to cut through the metal before the sleeve is installed.

In your experience of all the new building you worked in what % is the stair type of the pic you posted?

 

[infinity]

In your experience of all the new building you worked in what % is the stair type of the pic you posted?

I mentioned the difference in post #7.

A steel and Q deck building will almost always have metal stairways with concrete fill. A poured concrete building will use formed and poured conrete stairways. I'm guessing that maybe someone makes pre-fab versions but I have never seen them.

 

[Alwayslearningelec]

I mentioned the difference in post #7.

A steel and Q deck building will almost always have metal stairways with concrete fill. A poured concrete building will use formed and poured conrete stairways. I'm guessing that maybe someone makes pre-fab versions but I have never seen them.

Yes, got it.