Wood Truss Design
Metal-Plate-Connected Wood Truss
Metal Plate Connected Wood Truss
4/12 = 18.5 deg. 3/12 = 14 deg.
Pueblo Truss Co
Pueblo Truss Co., Inc. 469 E Industrial Blvd Pueblo West, CO 81007 Phone: (719) 547-1225 Fax: (719) 547-1023
pac-clad snap-on standing seam metal roof panels
Snap-On Standing Seam metal roofing panels are designed for use in roofing, mansard and fascia applications. The panels are designed to be installed over a waterproofed solid substrate and a minimum 3:12 roof pitch. Snap-On Metal Panels are to be factory roll-formed in continuous lengths. Maximum panel length is 45 feet and minimum panel length is 4 feet.
These metal panels are ideal for specification on applications where roofing transitions are required. The simplicity of the pan design combined with corrective leveling provides superior flatness and allows for greater workability on site.
Metal-plate-connected wood trusses are the predominant type of truss used in residential construction. They are typically fabricated from 2x4 or 2x6 dimension lumber. Trusses are categorized as “parallel” chord for use in floor and flat roof applications or “pitch” chord for sloped roof applications.
In a roof truss, the three sides (or perimeter elements) of the triangle are called “chords.” The “webs” are wood pieces connecting the top and bottom chords. Chords and webs are the “members” or elements of the truss. The “connectors” joining chords and webs in modern trusses are usually metal-toothed plates.
Manufacture of Trusses
Trusses are designed using sophisticated software that accurately calculates the structural load conditions in accordance with building code requirements. During construction is the best time to see how a truss roof system is configured and distributes loads. Almost as soon as trusses are set in place, maybe even the same day, the roof sheathing is attached. This quick construction time prevents inspectors from having a good opportunity to see the framing from outside the building. Fortunately, everything the fire service and building inspector need to see is visible from inside the structure during the complete building framing inspection. The web and chord elements are fabricated to exact dimensions. The pieces are arranged in their final orientation and the metal plates are applied using equipment capable of exerting high pressure to embed the metal-plate teeth. Trusses are inspected for proper plate orientation and plate-teeth penetration depth prior to shipment to the job site.
Performance Requirements for Code Acceptance
Metal-plate-connected wood trusses are designed and manufactured in accordance with ANSI/TPI1 National Design Standard for Metal Plate Connected Wood Truss Construction¹, as specified by the building code (International Residential Code 2003, Section R802.10.2, International Building Code 2003, Section 2303.4). More details regarding metal-plate-connected wood trusses can be found in the Metal Plate Connected Wood Truss Handbook².
- Monopitch roof
- pent roof
- shed roof
- lean-to roof
- skillion roof (in Australia)
- sloping flat truss
A mono-pitched roof is a single-sloping roof surface, often not attached to another roof surface. Mono-pitched roofs are sometimes called a pent roof, shed roof, lean-to roof, or skillion roof (in Australia). This is in contrast to a dual-pitched roof, also known as a gabled roof, which is pitched in two different directions.
A mono-pitched roof can also be a smaller addition to an existing roof, where keeping to the same slope (roof pitch) puts the mono-pitched roof lower than the ceiling height of the main structure. In this case even though the main roof has a flat ceiling, the mono-pitched part will have a sloping, or raked, ceiling line to maximise the ceiling height. The name lean-to roof comes from this form of addition.
Mono-pitched roofs can also be used to provide clerestory windows for a hallway or similar room where a row of windows is placed below the edge of the mono-pitched section reaching above the other roof below.
myroff.com Truss Chart
Structure of the monoslope roof
Monopitched Roof of Skillion roof mainly depends on gravity in order to maintain the integrity of its structure. One of the major advantages of this kind of roofing is that they can be easily constructed without much hassle within a very short span of time. The process of constructing a monopitched roof is more than simple and doesn’t require too many hands when compared with the gabled roofing. As a result monopitched roofing construction can be completed in very less time and doesn’t involve too much expense. Traditionally these kinds of roof were mainly built for garages but more and more people are now opting for monopitch roof truss for their homes. The monopitch roof system doesn’t come with many members which is one reason which helps this kind of roof to equally distribute its load to the load bearing walls which have been placed near the roof both internally and externally.
myroof.com Single Pitch Roof
A single pitched roof is a roof that has a single pitch in one direction. They go by many names, including pent roofs, shed roof, lean- to roofs, or skillion roofs. They are commonly used in sheds, and homes designed in the modern style. They are often associated with simple home and building plans, as they do not require any special skill sets or craftsmanship. However, simple does not necessarily mean boring. Single pitch roofs can often be striking, and give a sense of character to the home or building. Today, many new modern construction homes and buildings favor the single pitched roof for its clean lines and simple plans.
Single slope roof home plans often require little variation in materials and coloring, preferring to maintain a simple and sharp look. Typically, the home would follow the design of one material – wood, steel, brick, or any other material. It rarely changes shades, the roofing being a different color from the main house, but that is all.
MiTek Connectors Product Information
Burmon Cyclone Bracket
Green Building Advisor
Trim Joist Engineered Wood Products
RedBuilt Open Web Truss
PUEBLO, Colorado Chris Anderson, Lam-Wood Systems, Inc. Phone: 800-826-8488 Cell: 303-478-0776 Fax: 303-458-1739 ChrisA@lamwood.com
Roof Framing with Wood I-Joists
I-joists make for a strong, flat roof, but you have to pay attention to the connections at the ridge and eaves
Universal Forest Products
See Page 17 for roof application.
Simpson Strong Tie
Define and Design Metal-Plate-Connected Wood Trusses for Roofs and Floors
- Create trusses from scratch or import from CS Build
- Define and optimize webbing
- Calculate forces and design members and plates
- Generate engineered drawings for seal by a Professional Engineer
- Create cutting lists and assembly drawings
- Produce output files for automated saws and tables
Simpson Strong Tie LMH Building Center 2018 S Prairie Ave Pueblo, CO 81005 Phone: (719) 560-9663
Fastenal-Pueblo-POCO 3000 Granada Blvd Pueblo, CO 81005 Phone: (719) 566-0407
NetGen it’s a powerful 3D tetrahedral mesh generatorl that can handle complex geometries and a great variety of meshing options, the tetrahedral meshs as those created with Netgen are the best option on the selection of a discretization theorem for a non conventional bodycas long as it can handle a decent meshing density , wich it’s possible with the use of current medium-high level processing units. The tetrahedral elements can adjust more easily to the curves and spline surfaces of the model, preserving its proportion form.
On NetGen a 3D model can be meshed under a great variety of meshing controls in order to adjust de meshing density to the desired especifications.
CalculiX FE Software
Building Safety Journal
By William Bolduc, P.E., S.E.
Truss Plate Institute
The Truss Plate Institute (TPI) opened in 1961 to address the emerging market for metal plate connected wood trusses. We continue to serve that market and are fulfilling our mission “….to maintain the truss industry on a sound engineering basis…” by providing:
- Third Party In-Plant Quality Assurance (IAS Accredited)
- Bracing, Handling, & Safety Guidelines &
- Design & Quality Standards/Publications (ANSI Standards Developer).
What are the rates for your services?
by Anthony Ries on May 2, 2012
Metal Roof Panels – This roof type covers three types of metal roofs. The underlayment is per manufacturer. There are also certain corrosion resistance requirements that need to be met for the roof material.
- Lapped, nonsoldered seam. Minimum 3:12
- Lapped, nonsoldered seam with applied lap sealant. Minimum 1/2:12
- Standing seam metal roof. Minimum 1/4:12
Jon Peters Art & Home - Building Roof truss systems for shed, barn, or a tiny house by Jon Peters youtube