looking for rafter straps

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  #1  
Old 04-05-14, 10:43 PM
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looking for rafter straps

I need to secure these rafters to the cinderblock top plate. They are just
toe nailed in now. I want something stronger that i can screw in w/o
removing the planking. Any ideas?

I might install rafter ties, but Im looking for alternatives.

pics Looking For Rafter Straps - Roofing/Siding - DIY Home Improvement | DIYChatroom
 
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Old 04-06-14, 05:46 AM
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What are your hurricane straps attached to?
 
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Old 04-06-14, 06:04 AM
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Most, maybe all of the new block homes I worked on in fla [mostly in the 80's] had the hurricane straps embedded in concrete in the top lintel block. I believe this was mandated by the code. What makes you think the straps in your link wouldn't be strong enough?
 
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Old 04-06-14, 06:10 AM
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Look through the brackets and ties available from Simpson Stron Tie. They make a dizzying array of brackets and hurricane straps.
 
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Old 04-06-14, 07:23 AM
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those are not designed or installed to hold the rafters up. They are installed to hold the rafters down (to protect from hurricanes).

ref:
"What makes you think the straps in your link wouldn't be strong enough? "
 
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Old 04-06-14, 07:43 AM
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For that, only collar ties will help.
 
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Old 04-06-14, 08:04 AM
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my research says collar ties are for holding roof down, rafter ties are for holding it up or on.

collar ties 1/3 the way from top

rafter ties 1/3 the way from bottom
 
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Old 04-06-14, 08:12 AM
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They both keep outward pressure from splaying your walls out. I have never used anything 1/3 of the way, up. The rafters are tied to the joists, which also act as a deterrent to wall movement. I am assuming this is stick built and not trusses. Interior pix?
 
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Old 04-06-14, 08:28 AM
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rafters are not tied to the joists.
 
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Old 04-06-14, 09:03 AM
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OK. Let's start over. You want to tie these rafters to the top plate according to your OP. It has digressed to rafter ties across the inside of the attic. Really don't know what the concerns are. They appear to be tied to the top plate via hurricane straps, which answers your first concern. What is the ultimate question?
 
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Old 04-06-14, 09:08 AM
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toe nails holding the roof up, look weak. rafter ties or maybe collar ties and or something else to hold the rafters to the cinderblocks is needed.
 
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Old 04-06-14, 09:51 AM
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Ridge beam holds roof up, collar/rafter ties keep it from spreading walls, hurricane ties hold rafter to plate, plate is hopefully held to block via embedded straps. I don't know what else to say.
 
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Old 04-06-14, 12:18 PM
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Hurricane Clips

These should work and will available at your local Big Box:

Simpson Strong-Tie H1 Hurricane Clip
 
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Old 04-06-14, 07:00 PM
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and what holds the ridge beam up?
 
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Old 04-06-14, 07:05 PM
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Equal forces from the two roof sections, gravity and the grace of God to allow all the motions to work together. Seriously, are you having problems with walls separating, rafters lifting, or anything like that?
 
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Old 04-06-14, 07:25 PM
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tks. H10A and H10s even better
 
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Old 04-06-14, 07:28 PM
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Since I canceled my home insur, im adding hurricane straps, plank screws to rafters, gable supports and sistering sagging and cracked rafters, etc.

ref:
are you having problems with walls separating, rafters lifting, or anything like that?
 
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Old 04-07-14, 04:54 AM
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Cancelled home insurance or just the hurricane insurance?
 
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