Document ID : tj-9000 File Type: pdf File Size: 3.4 MB File Date: May 2023 Document Types: Design & Specification Categories. If you have any questions or require additional information, contact the largest engineered wood technical support and software team in the industry at here. Description: Design information for TimberStrand LSL, Microllam LVL and Parallam PSL. If inappropriate tools or methods are used, the beam may be structurally inadequate and require replacement. However, the exact size needed will depend on the specific load conditions, building codes, and other structural factors. It is also important to ensure holes are cut in a quality manner using the appropriate tools (such as a hole saw or router) with no overcuts. For a 13-foot span, an LVL beam with a width of around 3.5 inches and a greater depth, such as a 3.5 x 11.875 inches LVL beam, might be considered. Since these large holes result in reduced capacity, evaluation of any hole condition beyond that shown in our literature is necessary to ensure structural adequacy. The new round hole capabilities, summarized in the table below, are included in our Javelin®software today and will be available soon in our Forte® single member sizing software. For a floor beam, select the appropriate span table for one or two floors, identify the. Laminated veneer lumber typically comes in 1-3/4, 3-1/2, 5-1/4, and 7 widths or thicknesses, and depths of 5-1/2 to 24, including standard and nonstandard depths. Beam must be centered in building if floor joists are continuous over. Ratio of short span to long span should be greater than 0.4. Span is based on the more restrictive of simple continuous beam span. As a result of the testing, proprietary design procedures were developed so that multiple round holes up to 2/3 member depth could be located in Microllam® LVL, Parallam® PSL and TimberStrand® LSL with reduced design capacities and limitations on the number and location of holes. The distance an LVL beam can span depends on its width and depth. Table indicates the number of 13/ 4' wide LVL plies to be used for the given application. To provide a solution for the changing market needs, we destructively evaluated full scale structural composite lumber beams with round holes of varying sizes to better understand the effects of the holes. A versatile performer in a wide range of structural applications. With changing energy codes and the desire to run ducts in conditioned spaces such as the floor cavity, larger beam hole capabilities has become a more frequent request from our customers. To take advantage of this key feature, changing direction of ducts, adding soffits and complicated coordination with trades is required to avoid interference with rectangular beams. That means for 10 foot roof span, the depth of ridge beam has to be more at least 8 inches while the width is 6 inches. 10 foot span For 10 foot span for roofing, the recommended size of ridge beam is 3-2×8 or 6×8 size of beam. For example, a maximum 11¼” hole can be cut in a 14″ deep TJI® Joist. But remember this beam size is recommended for residential building. In contrast, large holes can be cut into the webs of TJI® Joists. For 1.55E TimberStrand® LSL, a maximum 4 5/8″ diameter hole for members 14″-16″ deep is permitted (see TJ-9000, TJ-9020, TJ-9500, TJ-9505 for additional information). Historically, we have limited hole sizes in Microllam® LVL, Parallam® PSL and 1.3E TimberStrand® LSL to a 2″ diameter round hole for members 7.25″ and deeper. This is because the failure modes and stresses at holes are complicated and not well understood. Learn more about BCI® Joists and our sizing software BC Calc® or view the US East and US West span and size charts. The size and location of holes that can be cut in wood beams, whether sawn lumber, glulam or structural composite lumber, have traditionally been very restrictive with few options for designers outside standardized rules in the building code or manufacturer’s literature. BCI®Joists are specially constructed I-joists with flanges made from strong VERSA-LAM® laminated veneer lumber with oriented strand board web and approved waterproof structural adhesives, providing outstanding strength and durability.
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