BCSI B3 PDF
May 25, 2020 | by admin
The BCSI B-Series Summary Sheets summarize each of the chapters of the BCSI book. B3 – Permanent Restraint/Bracing of Chords & Web Members. Refer to the BCSI-B3 Summary Sheet – Permanent Restraint/Bracing of Chords & Web Members for more information. All other permanent bracing design is the. To view any of the BCSI documents click on the links below. BCSI-B1 Summary Sheet. Handling, Installing, & Bracing BCSI-B3 Summary Sheet. Web member .
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Then, it is possible to drive multiple stakes along the length of this horizontal Tie Member as needed to develop the required lateral resistance by the earth. Some chord and Web members not shown for clarity. The capacities in this table are for normal load duration and assume moisture, tempera- ture and end grain factor of 1.
The horizontal or sloped structural system defined by the ceiling plane acting to transmit lateral forces to the vertical resisting elements. A falling worker attached to an inadequately braced set of Trusses could cause all the previously set Trusses to collapse in a gcsi effect. A clean jobsite will help to avoid trips and falls.
DO NOT store on uneven ground. Clay Tile and braced structures. Locate the Spreader Bar at or above mid-height of the Truss to prevent overturning. Prior to installation, repair all Trusses according to the repair details prepared by the Truss Designer or a Registered Design Professional. Connection options are also discussed for when toe-nailing is not enough. Bow Do not stand on Truss overhangs until Structural Sheathing has been applied to the Truss and overhangs.
Special design requirements, such as wind Bracing, portal Bracing, seismic Bracing, Diaphragms, shear walls, or other Load transfer elements and their Connections to Trusses shall be considered separately by the Building Designer, who shall determine the size, location, and method of Connections for all Bracing as needed to resist these forces. Top Chord sheathing not shown for clarity. The following B-Series Summary Sheets were specifically created for special conditions that are encountered during the Truss installation and Bracing process: Metal products used as Diagonal Bracing, Lateral Restraint, Bridging and Web Reinforcement, which are available from a number of manufacturers as alternatives to wood products.
Out of Plane Max. Truss with Top and Bottom Chords with equal slopes. Unload trusses rigid ceiling Armazones Hastiales vea el tiles — azulejos 4′ o. The Ground Brace itself should be restrained and braced as shown in Figures B and 17 or it is apt to buckle.
Second floor system shall have adequate capacity to support forces from Ground Braces. As stated in Section This condition is prohibited by some Building codes because adequate Bracing of this condition is difficult and sometimes impossible.
B3 Summary Sheet – Permanent Restraint/Bracing of Chords & Web Members |
Apply Diagonal Brace to vertical webs at end of cantilever and at interior and exterior bearing locations. Type ncsi machine-graded lumber designated by the design bending stress, Fb, and modulus of elasticity, MOE or E, values. Submittal documents consisting of construction documents, and other data shall be submitted in two or more sets h3 each application for a permit.
Shim the joint between the Strongback and Truss to ensure a solid Connection. The act of mechanically or manually hoisting.
Attach to Truss at 10′ o. Nail driven at an angle to the member. Additional restraint and bracing is typically required to transfer lateral loads bfsi design and bracing of PCTs. Begin installing Trusses only after any unsatisfactory conditions have bcssi corrected. Illustration identifying the assumed location of each Truss. Assemble the Girder Truss and jacks on the ground and lift the entire assembly into place. Numerous graphics accompanied by written instructions provide an easy-to-follow reference.
Nominal lateral design capacities have been adjusted by the Toe-nail factor and represent normal Load duration values.
Is the roof a hip style? The two-dimensional area formed by the top or bottom edge of adjacent similar Bottom Chords allowing for the Connection of ceiling Diaphragm, or Bracing members in a linear fashion.
Lateral Restraint by itself is not adequate to resist the buckling forces in the members to which it is attached without the rigidity provided by Bracing.
If Trusses are to be stored horizontally for more than one week, place Blocking of sufficient height beneath the stack of Trusses on 8′ to 10′ intervals or as required to minimize Lateral Bending and to lessen moisture gain from the ground 3b Figure B, page 4.
BCSI – Guide to Good Practice for Handling, Installing, Restraining
The method used to frame a valley will affect how the Loads from the upper roof are distributed to the supporting Trusses, and therefore, how these Trusses are to be designed. The Truss members form a rigid, planar, structural component and are usually assembled such that the members form triangles.
Use washers ware or framing members to be attached to the Girder Truss. Install hip jacks and end jacks at maximum 10′ o. See hoisting recommendations for Truss bundles page 6 or single Trusses page 8. Officer or other designated authority charged with the administration and enforcement of the building code, or a duly authorized representative.
The Contractor should seek any required assistance regarding construction practices from a competent party. If the Truss is already installed, shore up the Truss to relieve any Load.
Nevertheless, it is important to observe good installation, restraint and Bracing practices so floor systems are installed safely and successfully, and offer better longterm floor performance. Install additional studs or full-height T-Reinforcement to existing studs, if necessary, in the vicinity of the bundle.
If soil conditions are poor, it may be necessary to add a Horizontal Tie Member at ground level to connect the lower end of the Ground Brace Vertical and the lower end of the Ground Brace Diagonal. Worker attention is often directed upward, bczi while moving around.