Weyerhaeuser 1-3/4×18 Microllam LVL: The Build-Up Beam That Saves Your Crane Budget

The 1-3/4×18 Microllam LVL beam from Weyerhaeuser offers Montana contractors a 2.0E engineered solution that spans up to 60 feet while solving the heavy equipment problem most long-span beams create. This beam can be built up on site, reducing the need for heavy lifting equipment/cranes required for steel beams — critical when you’re working remote Montana jobsites where crane access costs a fortune or simply isn’t possible.

The beam resists warping, splitting, and shrinking, delivering predictable performance whether you’re framing a sprawling ranch house outside Kalispell or spanning the main floor of an agricultural building in the Mission Valley. At 1-3/4 inches thick by 18 inches deep, it’s substantial enough for serious loads yet manageable enough that a crew can handle individual plies before assembly.

Build-Up Capability Changes the Game

The real advantage shows up in installation logistics. Multiple plies can be nailed or bolted together on site to create massive beams without massive equipment. Two guys can carry individual 1-3/4” plies up a ladder or through a tight access point, then build them into a multi-ply beam exactly where it needs to go. Try that with a steel I-beam or a solid timber.

Available in lengths from 1 foot to 60 feet, these beams adapt to everything from a simple door header to spanning an entire building. The Watershed overlay may be included or applied in specific regions for jobsite weather protection — though Montana contractors know to keep any engineered lumber under wraps regardless.

Specification	Value
Thickness	1-3/4 inches
Depth	18 inches
Grade	2.0E (Engineered-grade)
Material	Laminated Veneer Lumber (LVL)
Available Lengths	1 ft to 60 ft
Build-Up Method	Nailing/bolting multiple plies together

Where This Beam Earns Its Keep

Common applications include residential structural beams, headers for doors and windows, floor joist systems, support beams for open-plan designs, and load-bearing wall supports. The 2.0E rating means it’s engineered for serious structural work, not just light framing.

For Montana’s sprawling ranch homes and open-concept designs that buyers demand, this beam delivers the clear spans without cluttering the floor plan with posts. In agricultural buildings where equipment needs maneuvering room, the 60-foot maximum length handles serious spans. The beam consistently stays straight and strong — no surprises when you’re pushing the limits on span tables.

The Bottom Line

Weyerhaeuser’s Microllam LVL offers uniform and predictable performance with dimensional stability that beats solid lumber hands down. More consistent straightness and strength than solid timber, plus the ability to build up on site makes this the practical choice for Montana contractors dealing with long spans and limited crane access.

The 18-inch depth handles serious loads, the 60-foot length capability covers most residential and agricultural needs, and the build-up design means you’re not paying for a crane just to set a beam. For contractors who understand that engineered lumber technology has surpassed solid timber for structural applications, this Microllam delivers the spans and the installation flexibility that real jobsites demand.

FAQ

How does build-up assembly actually work on site? Multiple plies can be nailed or bolted together to create the required beam thickness. Crews position individual 1-3/4” plies, then fasten them together per the engineer’s specifications. No special equipment needed beyond standard framing tools.

What’s the real advantage over solid beams? The beam resists warping, splitting, and shrinking better than solid timber, while offering more consistent straightness and strength. Plus, it can be built up on site, reducing the need for heavy lifting equipment that steel or solid beams require.

Can this beam handle Montana snow loads? With a 2.0E engineered grade rating and 18-inch depth, this beam has the strength for serious structural loads. Always verify specific load calculations with an engineer for your elevation and local snow load requirements.

What lengths should I stock for typical projects? Available from 1 foot to 60 feet, most residential projects use 8 to 24-foot lengths for headers and floor beams. Agricultural and commercial projects often push into the 30 to 50-foot range for clear spans.