Tornadoes and pole barns

Last night on the news were pics of pole barns in Oklahoma with the metal roofs ripped off pole barns, only perlins left. One pole barn had the trusses missing, only the sides remained. News also showed a few damaged homes too. So far no real bad weather in In. How have you faired?

When I read the news it makes me feel fortunate to live in New England. We don't get the terrible tornadoes, seldom get floods once and a while a small earth quake and if 10 acres of woods catches fire it is all over the news. my thoughts and prayers are with all you people who experience all of that.

We had some wind storms and an F1 tornado in the area a few weeks ago. Doors on the west end of neighbors pole barn were open and most of the roof in that section ended up in the barn lot about 40 yards away. Perlins and all, right down to the trusses. a lot of the rest of the roof had bulges and scrapes through the paint from that section of roof going across it, and the sides were bulged and pulled loose in places.

Didn't you get record snow that missed me?

Been one of those years so far with very few storms o for that matter much rain. Not much rain is not good but storms are not good either.

I wonder how many of those building that lost their roofs were fastened with nails rather than screws.

Also, there's no excuse for losing trusses in all but the very worst storms if they're properly fastened. In addition to the usual toenails, all my trusses are attached to the girders with these: <a href="http://www.homedepot.com/p/Simpson-Strong-Tie-18-Gauge-Hurricane-Tie-H10-2/204842308?cm_mmc=Shopping%7cBase&gclid=CIPco_GEv8UCFQuMaQodySUAGA&gclsrc=aw.ds">Hurricane Tie</a>

yep they help hold a pole barn ,, as you all know pole barns and tornados don't like each other ..

There are 4 nails used to hold a 3 ft shingles down, then another 4 six inches above and 6 inches below. Compaired to metal roof which have fewer nails or screws per square.

Depending on the shingles, some 35 year ones are very heavy and have a higher wind rating.

Do they have a wind rating for metal?

My barn is metal with screws and PE signed off drawings rated for 90 mph. The tornados we had a couple of days ago were F1 at 110 and the Van, TX. a F3 at 140. Don't expect it to be standing if you take a direct hit.

A properly screwed-down metal roof can handle a lot of wind. Each screw joint is good for several hundred pounds in tension. And screws don't loosen up over time like nails tend to do.

As for shingles, they rely a great deal on their glue strip to stay put. And those nails need to be placed EXACTLY where the manufacturer says. So-called "roofers" like to place their nails high on the shingle, because they don't have to be careful about placement and can nail faster. If you drive a nail half an inch below where it's supposed to go, it will be exposed. But if you drive it two inches high, nobody will be the wiser. Until the first windstorm, that is. Driving a nail too high creates two problems. First, it will miss or nearly miss the lower shingle. But also, because of the gap between the upper shingle and the roof (caused by the lower shingle), a nail set too high will blow right through the top shingle. You might as well not nail it at all.

I discovered this a few days ago when I was replacing some missing shingles on a rental house. This roof was done about fifteen years ago by friends of my son who claimed to be "roofers". When I started to replace the shingles, I found that the adjacent shingles were held on only by their glue strips. A gentle tug would pull them off! Almost all the nails were set so high they missed the bottom shingle and blew through the top one.

Red neck hurricane ties.

It looks like he's just afraid of a gravity failure.

>Red neck hurricane ties.

Ha! Well it looks like they did the job.

Can't really blame the shingle for someone not installing them properly. I used to do all my roofing. Now I hire a good contractor, haven't had a problem using 35 year shingles.

I've seen a lot of screwed down metal roofs where the wind has lifted the metal. Guess we can blame it on the contractor not putting in enough screws.