![]() ![]() We then adjust these design values to consider the long-term environmental and thermal effects mentioned above and see if the wood beam can still support the loading we anticipate it to carry. Each wood species and grade has its own set of stiffness or design values, including bending stress, shear stress, tension and compression stresses, and modulus of elasticity. Other than the size of the beam, we also have a wide range of selection of wood species and commercial grade. We want to choose the size of lumber that can support the beam load we need to apply to it and can handle the effects of humidity and moisture, extreme temperature, bending, and shearing (to name a few). The tables include values for section properties and capacities and allowable loads for simple span and cantilevered beams.Īccess a complete list of APA publications about glulam in APA's Resource Library.When choosing what size of lumber to use as a beam, we must consider various factors so we won't have a wood beam that can pose a danger to us. ![]() The Glued Laminated Beam Design Tables, Form S475, provide recommended preliminary design loads for two of the most common glulam beam applications: roofs and floors. It also highlights some of the many applications where glulam is used in construction. The Glulam Product Guide, Form X440, describes APA trademarked glulam, addresses important design considerations and includes a specification guide. The APA trademark is recognized by all major model building codes. The mark signifies that the manufacturer is committed to a rigorous program of quality verification and testing and that products are manufactured in conformance with ANSI Standard A190.1, Standard for Wood Products-Structural Glued Laminated Timber. Glulam beams manufactured by APA members are certified with the APA trademark. Common custom shapes include straight beams, curved beams, pitched and curved beams, radial arches, and tudor arches. ![]() Typical stock beam widths used in residential construction include: 3-1/8, 3-1/2, 5-1/8, 5-1/2, and 6-3/4 inches.įor non-residential applications, where long spans, unusually heavy loads, or other circumstances control design, custom members are typically specified. Stock beams are manufactured in commonly used dimensions and cut to length when the beam is ordered from a distributor or dealer. Glulam is available in both custom and stock sizes. Learn more about glulam in commercial and residential construction. Glulam also meets demanding environments of bridges, utility poles, cross arms, and marinas. In commercial construction, glulam is used in appplications ranging from large, flat roof systems to complex arches. It's also a workhorse in common hidden applications, including simple purlins, ridge beams, garage door headers, floor beams, and large cantilevered beams. In homes, churches, public buildings, and other light commercial structures, glulam is often specified for its beauty as well as its strength. Glulam has a reputation for being used in striking, exposed applications such as vaulted ceilings and other designs with soaring open spaces. Glulam is available in both custom and stock sizes and one of four appearance classifications: premium, architectural, industrial, or framing. Glulam is versatile, ranging from simple, straight beams to complex, curved members. The grain of the laminations runs parallel with the length of the member. Glulam is a stress-rated engineered wood beam composed of wood laminations, or "lams", that are bonded together with durable, moisture-resistant adhesives. Increased design values, improved product performance, and cost competitiveness make glulam the superior choice for projects from simple beams and headers in residential construction to soaring arches for domed roofs spanning more than 500 feet. Pound for pound, glulam is stronger than steel and has greater strength and stiffness than comparably sized dimensional lumber. Glued laminated timber, or glulam, is a highly innovative construction material. Glulam Versatile Engineered Wood Product Delivers Strength, Beauty, and Reliability Glulam Basics
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