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How to frame a window.

4240 Views 8 Replies 3 Participants Last post by  AGWhitehouse
I have plenty of experience with block fences, but would like to attempt a block garage. I need help on how to create a window fram or opening when the wall meets the window or door. Do I pour a window header? If so how, and are there any other alternatives.

I would like to thank you in advance.
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I researched both your sugestions and they seem like better alternatives than what I had in mind. Most precast lintels and sills require shipping though. If I decided to use the steal T, would I run two parrallel post across the window and doorway? Then mortar and set blocks?
 

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Here are three examples of the more common field-built lintel techniques. Size depends on span and load, bearing points are usually 8", though larger spans require more. The jambs need to be grouted solid and rebar added to take the compression loading.

Steel T or Double L: http://www.sweethaven02.com/BldgConst/en5157a0076.gif

U-Block Field Built: http://www.omniblock.com/wp-content/uploads/2011/04/dd13.png

Wide Flange Beam: http://images.hanleywood.com/cms/MASONRY CONSTRUCTION MAGAZINE/2009/September/MC090901012L1.jpg
 

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You'll have to reference some load tables. The weight of the structure and possible snow loads coupled with the span length all play into the assemblies parts sizing. Even the grout mix strength plays a role.
 

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