thanks in advance for reading. I typically refer to Raymond H.R. Tide, “Integrity of Structural Steel After Exposure to Fire”, Volume 35 No. 1: First Quarter (1998), pages 26 through 38. in looking at fire damage to structural steel. In my case I have no visual distortion/damage to steel...
i am trying to figure out why ceiling fell and have at least a modern-day code reference to back up my opinion. my opinion being that smooth shank nails were used to attach wood furring in lieu of ring shank. you know of a code reference i can use for attachment of wood lath to underside of wood...
I have an old building from 1908 with a wood lath and plaster ceiling. I suspect the ceiling fell down (only about 30 square feet of ceiling) due to smooth nails backing out over time. I have an older version of USG Gypsum Construction Handbook, but i don't see specific section regarding...
Thank you, ANE91. I have no reason to believe it is wind. Good observation on your point that the insulation is not disheveled. I definitely saw no signs of wind on outside of building. Trusses are 6 feet apart so I highly anticipate failure in nail withdrawal once I run the numbers. Thanks again!
Thank you for reading. I have an R-panel metal ceiling (3-foot wide sheets). The ceiling attaches to 2x4 wood nailers (laid flat). Nailers spaced every 30 inches and nailed to truss bottom chords with 2 to 3 10d nails. Trusses are at 6-foot centers. This is in a large storage faciltiy. No...
Yes. it is a unit ventilator on the second-story above. I think that is what it is from. You think just condensation from the unit (i'm not an HVAC guy)? Thanks.
In the attached photos is the north elevation of a 2-story school addition. CMU exterior walls. Steel floor/roof framing. Vertical stains are below a second-story joist bearing at north exterior wall (see dashed outline in Photograph 1). No streaks are below any of the roof framing members...
Hello.
I have a wood-framed fink truss. A rough sketch is attached. As you can see in the sketch, the top/bottom chord interface at the left hand side is not at a support. This is where failure occured, which I attached a photo of (note that a temporary wall is now in place below the failure...
Hello Engineers.
I have a 5-story condo building (no drawings, no site visit). I don't know what the floor framing is. Floor framing reportedly spans 24 feet. At the back side of one of the units I have a localized floor deflection of 1/2 inch over the last 4 feet from the sliding glass door...
Hello.
When I see large deflections on chimneys rather than brittle failure, I start to think that the mortar is a lime putty mortar vs. portland cement mortar. Short of doing a vinegar test, or scraping to identify white inclusions vs. white aggregate, can you tell just by looking at the...
I have opposing 2x6s meeting at spliced 2x6 ridge board. Is there a code section (IRC) that references this detail, and if so, what code section is it? Should a vertical support be provided at ridge boards abutting? I attached one pic. Thanks...
Hello.
I have a warehouse wall about 18 feet high built in the 1960s. Don't know reinforcing, cell grouting, block width. I have horizontal cracks with lateral displacement between windows. I have a CMU cracked vertically with inward horizontal displacement. There is no unbalanced soil...
Hello. I have two rafters in a log cabin structure that are fractured near the ridge. The two affected rafters oppose each other. The rafters are not water-stained and fractures are not in areas of knots. The rafters span about 17 feet on a 12:12 pitch roof. The rafters are about 3 wide, 7 1/2...
Hello. I have two rafters in a log cabin structure that are fractured near the ridge. The two affected rafters oppose each other. The rafters are not water-stained and fractures are not in areas of knots. The rafters span about 17 feet on a 12:12 pitch roof. The rafters are about 3 wide, 7...
Please see attached photo. I have a cracked lintel. The cracking is about 1/16 inch wide and is horizontal across the lintel's length (at about mid-height). Lintel span is about 5 feet. Stucco above is not cracked. The lintel supports CMU above. This is an early 1900s house with exterior...
Thank you in advance for reading my question on wood-framed decks.
Figure R507.10.1 is not in the version of 2012 IRC that I have (digital or PDF). This figure illustrates diagonal bracing requirements for free-standing decks greater than 30 inches above grade. The figure is in another PDF I...
