Window Header Span Table (DIY Project Download)

The code tables call for double 2x’s for headers, advanced framing suggests one. What size headers do I need for a 8′ span is it 2×8 or 2×10? You can’t beat sawn lumber for most small window headers, but as spans and loads increase, stronger materials are a better choice. Want to add a new window or door to an exterior weight-bearing wall? The longer the distance a header spans and the heavier the load it supports, the more substantial it needs to be.

window header span table 2Proper size of header to support new door in load bearing wall? For header spans see Tables R502.5(1) and R502.5(2). Table R502.5(2). These are all term to describe and calculate door and window header sizes. Many codes have span tables that have pre-determined spans associated with the loads required for your area. Click on the appropriate beam, this will take you to the calculation table for your project.

A double 2×10 could never carry the load across a 10′ span for a 2nd floor, its furniture and people, the ceiling above and any attic storage that is being used on those ceiling joists. This long adress is to the header tables on the CWC’s Spancalc. And a side note, is a 2×6 header code compliant for a 3046 window? I’m trying to squeak a 3046 with a 3010 transom into my own house and want to make sure I’m not getting to low. Re: Header Sizes has a lot of span tables you can look up. You’ll have to register (it’s free) before you can search them. This article was written as a companion to Installing A New Window In An Old Wall, but the discussion also applies to new construction framing. The blue shaded areas in the drawing below highlight some of the main components used in the framing of a typical window opening when a header is used that does not reside against the top plate. This table was found in a book titled Fundamentals Of Carpentry – Practical Construction, (5th Edition), by Walter E.


window header span table 3Does anyone know where I can find a header span table? I’ve googled and searched the archives here and can find plenty of floor joist and rafter span tables but havn’t had any luck finding a header span table. Calculate the load, look up span tables for lumber or engineered lumber, do the math. Span charts and 2012 IRC building codes for girders and headers. Includes span tables for all load bearing locations and the number of jack studs.

Sizing A Header