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Know Your Zones – Part 2: Walls

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Know Your Zones – Part 2: Walls

In the second part of this three-part series, we take a look at four zones in the home where a focus on walls is especially critical.


November 15, 2016

For most of a home’s walls, solid-sawn lumber studs perform well and are straight enough that builders and their homeowner-clients are happy with the results. But some walls require extra attention—and a sturdier, straighter, engineered product—to prevent callbacks.

By applying a “Zone Framing” solution that switches engineered lumber for solid-sawn during construction, builders can prevent callbacks for a home’s problem zones, like kitchens, bathrooms, laundry rooms, staircases and hallways. The reason: Engineered products like TimberStrand® LSL from Weyerhaeuser don’t shrink, bow and twist behind the walls like solid-sawn studs are prone to do.

The result is a straighter vertical surface that saves contractors the time they might have spent fighting with wavy walls while installing cabinets and backsplashes, or while building tall walls.

Here are four zones in the home where straight walls are critical and where engineered wood can save a building crew time, trouble and the cost of responding to customer complaints. 

1. Cabinet walls. Kitchen, bathroom and laundry room walls have to be flat to correctly support tile, cabinets, backsplashes or stone countertops. Attaching a cabinet or another heavy, decorative surface to a wall that isn’t perfectly square forces the trim carpenter or tile installer to trim and shim to make the attachment material fit the inconsistencies in the wall. Even then, a cabinet is likely to appear slightly crooked once it’s hung; a shallow backsplash surrounding a granite countertop could wind up with a gap between it and the wall. 

A wall crafted with TimberStrand® LSL, on the other hand, saves the carpenter from having to cull through a stack of solid-sawn lumber to find the straightest ones, as engineered products are uniformly straight.

2. Tall walls. Two-story foyers, vaulted ceilings over great rooms and open staircases with large windows appear to be here to stay. So is the need for extra-long studs that allow for full-height framing of multiple-story walls.

The challenge: The International Residential Code’s stud tables stop at 10 feet, so framing with studs that are longer than that requires the builder to size them. That requires the builder to consider variables like wind speed based on the home’s location; the amount of weight the wall will support; the size of the wall’s windows; and the impact of the home’s exterior cladding material, which will determine the allowable deflection of the wall.

Replacing solid-sawn lumber with TimberStrand® LSL, available in lengths up to 48 feet, eases that burden because the product comes with design tools and technical support, freeing the builder from creating the design independently.

It also creates a straight and dimensionally stable wall that, unlike one framed with solid-sawn studs prone to movement and shrinkage, will not break window seals and cause leaks.

3. Columns. An interior column that is a single, solid, rectangular piece typically is 40 percent stronger than a column built by nailing several studs together. 

A field-assembled, built-up, solid-sawn “stud pack” might not be adequate to support the large, concentrated loads created by designs calling for wide, open spaces and long spans. Solid section Parallam® PSL provides a high-strength alternative. Additionally, the National Design Specification for Wood Construction requires that the nails are long enough to penetrate all pieces of a stud pack. Using solid section Parallam® PSL saves the builder the trouble of locating nails long enough to make the complicated connections.

4. Light-duty headers. Builders most often cobble together leftover 2-by-10s or 2-by-8s into headers for short window and door openings. And many use the same size header, no matter how large or small the opening. But headers fashioned from 2-by-10s are often much too big for small windows.

Opting instead for one-piece headers from pre-cut TimberStrand® LSL, which is available in depths of 4-3/8 inches and deeper, saves time in the framing process, while minimizing waste. Plus, because the TimberStrand® LSL headers take up less wall space than those made from left  -by-10s or 2-by-8s, there’s more room for wall insulation.

 

Did you miss the first part of this series? Click here to read it now.

 

Written By
Renee Morgan is a Product Support Engineer for Weyerhaeuser based out of Charlotte, N.C. She is a civil engineering graduate of the University of Tennessee. During her 10+ years with Weyerhaeuser, Renee has provided technical support for Trus Joist products for numerous residential and multifamily applications in Eastern U.S. markets.
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