Flying Roof
Flying Roof
(OP)
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Contact USThanks. We have received your request and will respond promptly. Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting Guidelines |
|
Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.
Here's Why Members Love Eng-Tips Forums:
Register now while it's still free!
Already a member? Close this window and log in.
RE: Flying Roof
RE: Flying Roof
RE: Flying Roof
=====================================
(2B)+(2B)' ?
RE: Flying Roof
Certainly wasn't much uplift restraint in the post construction.
Image 1
Can get some idea of how it was framed here. https://www.bostonglobe.com/2019/07/24/see-aerial-photos-damage-from-tornados-cape-cod/8ApDale2lBYYWToiWklRML/story.html
RE: Flying Roof
RE: Flying Roof
RE: Flying Roof
RE: Flying Roof
https://www.mass.gov/service-details/past-editions...
There are some comments that the roof is new, however, I highly doubt the structure is new. The current MA building code excludes chapter 34 of the IBC and requires compliance with the IEBC. If one were to follow Chapter 4 of the IEBC it's possible that the roof structure is original. The roof was likely just replaced (new roofing materials and not structure) and not strengthened.
I would like to think a new structure would have withstood the wind loads imposed on it....and in fact, the rest of the hotel is still in place, so maybe is was just a freak issue.
Interesting enough, I was talking to a ME the other day (my neighbor has a son-in-law who is a ME). I was trying to help him fix the neighbors lawnmower. He knows I'm a licensed engineer working in the realm of structures. He proceeded to bash the SE field talking about how poorly buildings are designed/constructed today as opposed to 40 years ago. His evidence revolved around new buildings in FL that being destroyed by hurricanes. I have no idea if his examples are real or fake.... probably hearsay.... at that point I was just singing the meow mix song in my head.
RE: Flying Roof
RE: Flying Roof
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
RE: Flying Roof
I didn't want to get into that with him. He was of the opinion that he was right and there was no convincing him otherwise.
ironic,
That depends on when you are trying to add them. If they have the underside of the roof exposed the additional costs would be less than if the existing roof was covered with gypsum. A typical roofing replacement would just have you stripping the existing roofing material off the roof and reinstalling a new material. The hold downs in question are not that expensive (as far as I know). Most of the costs is associated with the labor required for the install.
RE: Flying Roof
I didn't seen a single framing connector other than nails in any photos. The joist that blew off cantilevered out over the balcony and spanned back to a perpendicular joist. It appeared that there was 3-4 nails from the perp. joist into the ends of the cantilevering joist.
RE: Flying Roof
RE: Flying Roof
According to my friend, before he entered the USAF he worked as a helper in Florida residential construction. I do not know what region of Florida exactly, but the general area was central Florida because that is where he told me he grew up.
On the job of building foundations for slab-style homes, there was a requirement for inserting a rebar grid into the forms before pouring the concrete. The crew (including my friend) would wrestle the rebar into place. The job foreman would walk over to the forms with the inspector and the inspector would verify the rebar was in place. Then the foreman and the inspector would wander off a good ways, usually into the site trailer or at least behind it. Then the work crew would remove the rebar from the first foundation, move it to the second foundation, and set it in place as the concrete was being poured into the first foundation that was now without rebar.
After the first foundation concrete pour was complete, then the only person on the work crew who had permission to speak to the foreman (when the inspector was onsite) would approach the foreman with the announcement that the second foundation was ready for inspection. The foreman and the inspector would stop by the second foundation where the inspector would agree the rebar was in place. Then the foreman and inspector would wander off again, while the work crew moved the rebar to the third foundation and then the second foundation concrete pour was accomplished. Rinse and repeat for the length of the block.
RE: Flying Roof
What are the labour costs for removing installed re-bar?
--
JHG
RE: Flying Roof
RE: Flying Roof
Dan - Owner
http://www.Hi-TecDesigns.com
RE: Flying Roof
Edit: For what it's worth, these kinds of things were happening all the way up through the Hurricane Andrew rebuild. The urban legends I heard about were things like plywood sheathing only 4 fasteners.
Edit Edit: A quick Google search brought up some interesting stories about the deficiencies exposed by Hurricane Andrew and fraudulent practices which continued on in the rebuild.
RE: Flying Roof
RE: Flying Roof
I used to frame houses with my father through when I was going through school. He used to build about 1 house per year as a side job/project/hobby. It was always my job to use the nail gun (my father and his partner would layout the walls and help square everything up), and lets just say I could never follow the studs properly. I used to get chewed out for missing the studs with the nails as the building paper was applied to the walls while is was on the ground.
I was never officially told what nailing pattern to use. I would just throw a bunch of nails into the sheathing. Now that I am on the other side of the coin I know the importance of what I was doing back then.
RE: Flying Roof
the locals sun bath behind stone walls because the wind is so high.
They have a tree next to the church called Da Tree. Its the tallest on the island at 12 ft tall and only survives because of the church acting as a wind break.
RE: Flying Roof
Dan - Owner
http://www.Hi-TecDesigns.com
RE: Flying Roof
RE: Flying Roof
To be fair same thing happens in Uist and Benbecular as well.
here is the local wind scale
RE: Flying Roof
Fond memories of the catering staff on Hrossey sprinting towards my elderly father at breakfast time on a rough crossing a couple of summers ago as he set off across the middle of the floor in search of porridge. They weren't to know that a rolling deck is about the only place he doesn't fall over.