"What Type Of Doorway Support "Arch" Is This?" Topic

Look at this NORAD facility in Ontario:

YouTube link

Is it too wide to be called corbel?

Thanks,

Dan
TMP link

I'm not sure what I'd call it, but definitely not corbel – too wide, but more pertinently the construction's wrong – a corbel arch is comprised of blockwork, not cast material.

Dom has it….cast span….

I've seen concrete culverts that look a lot like that, but the angle (usually 45 degrees) is present throughout the entire length of the tunnel's roof.

link

But the examples in the first post above are for openings between rooms or support sections.

Would that make any difference when it comes to the name?

Dan

I dunno – "arch" seems a stretch to be honest – at least in the second photo it's not really an arch any more than the parthenon is – really they're just flared pillars rather than an actual arch.

The first photo is more firmly an arch, but what the term is for the style (or if there even is one), no idea, sorry.

As far as I know, those angles connecting from vertical to horizontal in reinforced concrete are called by the dignified name of "haunches."

None of the structures pictured above are arches, although the haunches are there to take care of some of the forces that arches are good at dealing with, and thus the resemblance.

Now some engineer will come along and tell me how wrong I have it.

Are the concrete "haunches" added to the perpendiculars later, or are they cast at the same time?

Thanks,

Dan

Looks like they're indeed called "haunched beams"!!!

link

link

Thanks guys,

Dan

they are called "Haunch Corners" in the case in your first photos they are they are called cast Haunch Cornered supports

I'd think the casts would be monolithic in the cast-in-place examples from the initial post. Fun fact-a new pour of concrete doesn't 'stick' to an existing, cured, pour. Typically reinforcing bar is left sticking out of the cured pour to be tied into later by the reinforcing in the new pour. You might also see keyways, like in the precast examples above.

In either case there's a visible joint, which could be a nice easy detail to show in miniatures terrain.

I think I've just found my new prefab house…

Cheaper to buy some shipping containers, use some PU foam & plywood panelling to form internal walls. Windows aren't really necessary as could use CCTV for external views.

Although that burns energy and you'll probably wind up depressed and vitamin D deficient. Windows are good….

Vampires, Orcs and Morlocks might enjoy it though!

Dan