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Structural Inspections Contains discussions about the structural portion of a home inspection. This includes foundations, framing, etc.

 
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  #1  
Old 3/8/06, 9:05 AM
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thejnicki thejnicki is offline
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Default Rafter Overlay

Roof type was a hip roof with concrete tile covering. Attic is truss and rafter framed, take a look at the way the builder overlapped the rafters in this particular area. My question; Is the overlapp enough & are there a suffiecient amount of nails tying them together?
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rafter-overlay-hpim2244.jpg   rafter-overlay-hpim2245.jpg  
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  #2  
Old 3/8/06, 2:23 PM
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David P. Valley David P. Valley is offline
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Default Re: Rafter Overlay

Tim,

Welcome to NACHI.

I'd like to see bigger pictures.

Is that the only 2 X that was cut in this area?

It appears that there's no bearing on that rafter end. This repair looks like a shoddy repair from here.
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Old 3/8/06, 3:47 PM
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Kenton H. Shepard, CMI Kenton H. Shepard, CMI is offline
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Default Re: Rafter Overlay

It appears that the lower rafter is bearing on a purlin (if that's what it is, can't tell from this photo) but the upper rafter is not, meaning that it is depending on the shear strength of nails to carry the load it supports. Good framing practice would have both upper and lower rafters bearing on framing.

I might physically point it out as an example of poor framing practice but it's not a defect and I wouldn't call it as defective or recommend an SE unless I saw evidence of failure, meaning separation between rafters/nails pulling loose. -Kent
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Old 3/9/06, 6:08 PM
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Robert J. OConnor Robert J. OConnor is offline
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Default Re: Rafter Overlay

Although the pics are blurry, it looks like maybe 2 (maybe 3) 8d or 10d nails (no thru penetration) at a location with heavy vertical/shear load. For rafters under a decent snow load or wind uplift it wouldn't be adequate, and there does appear to be some separation of the members. Look at the IRC nailing schedules for a rough idea if you are curious.

I would recommend evaluation/repair by a licensed framing contractor.

JMO & 2-nickles



Robert O'Connor, PE
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LIU CW Post Adjunct Professor
NACHI Education Committee
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Old 3/9/06, 10:14 PM
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Default Re: Rafter Overlay

i think the best way would be to lag them to gether, but if you have to use nails, i agree that 2 is not near enough. find the code, indrease it by 50% and recommend.
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