I had figured in to use h-clips for my sheathing on the roof of a project I am working on. I'm not sure where these actually need to be used in a roof deck. I will have my rafters on 2' centers and I'll be using 5/8 OSB for decking. From what I understand they are only used under unsupported edges but I may be wrong..
I don't see having unsupported edges though if everything will end up on a rafter. There should be no free hanging edges.
Clips are designed to be placed in between two rafters to minimize the span, in other words they are meant to almost serve as an additional rafter.There should be no need for clips with 19/32 OSB @ 24 O.C for standard roof application unless you are working on a flat roof.
Clips are designed to be placed in between two rafters to minimize the span, in other words they are meant to almost serve as an additional rafter.There should be no need for clips with 19/32 OSB @ 24 O.C for standard roof application unless you are working on a flat roof.
No, they are not an "additional" rafter and serve no primary structural purpose. They act as a spacer to keep plywood from butting with no room for expansion, and act to keep two adjacent pieces of plywood in the same plane which helps for foot traffic during construction, upflift movement over time, which may protect the underlayment.
Agree, it is a good idea to use clips with CDX plywood , no need to be used with OSB in my opinion being that veneers are alternated and virtually there is no warpage.
With 5/8 you dont need H clips. What is th slope? With a low slope deck you can use T&G below a torch on membrane. If it is a 4-12 slope or greater pass on the 5/8 and go 1/2" with H clips to save some money and 1/2 a log from the veneer mill.
Clips are designed to be placed in between two rafters to minimize the span, in other words they are meant to almost serve as an additional rafter.
I hope I'm not stepping on anybodys steel toes but the H-clip does not alter the span it ties the two sheets together mid span and helps to distribute the load.
Hey no you are not stepping on my toes , i was just trying to simplify for the OP so he can picture the placement , you are right clips do not alter the span ( i meant to say minimize the span of the sheathing not the structure).
:thumbsup:
J S I'm in Canada with lots of snow and never used more than 1/2" with H-clips on a two foot span. Low slope roofs with torch on or tar and gravel I've gone heaver, up to 3/4 T&G
Help! I am building a pole barn with a metal roof. I had plywood put on early spring but didn't have the funds to buy the metal sheets for the roofing so the plywood has gotten a little bleached. Some of the edges are a little warped. I. Planning on nailing the curled edged down and them applying roofing felt over the top before putting the metal sheets down. Is that ok to do. I will go under the plywood and add some 2x4 between the joist so there is extra wood to attach the metal sheets to is that acceptable
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