 Trimming and Altering
Open Joist™ is manufactured in one-foot incremental lengths and may be trimmed by a maximum of 11 inches to match exact dimensions of each job.
Truss End Trim
It is not always necessary to trim Open Joist. Trusses can often be installed at an intermediate bearing in a “handshake” fashion, eliminating the need for trimming (1-1/2” of the truss’ end block must sit on a bearing). Also, if 5-1/2" or less need to be trimmed, it can be trimmed from one end of the Open Joist truss. Open Joist trusses don’t need to be finish-trimmed to straighten rough-end cuts. Lengths are marked on each truss end and never need to be cut from longer lengths at the job-site.
Ribbon Notch and Fire Cut
Special end trims are possible with Open Joist. A ribbon notch
may be cut into the end block as long as a minimum of 1-3/4"
of the end block remains at its narrowest point. Following the same
requirements, angled "bevel cuts" or "fire cuts"
may be made on the ends of Open Joist trusses for pocket installation
or rafter clearance.
To download one of the details below, right-click or Ctrl-click on the link, then choose �Save Target As� or �Save�
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Conditions Not Permitted - DWG / PDF |
Guidelines for Cutting
Only the end blocks of Open Joist trusses may be cut according
to the guidelines stated. Top and bottom truss chords and truss webs
may not be cut, drilled or notched. Altering these elements will alter
the trusses’ structural integrity and may result in dangerous
conditions. Cutting, drilling or notching chords and webs (other than
normal end block trims as previously stated) without prior approval
from Open Joist Engineering will result in the assumption of
liability for floor system defects and responsibility for repair of
such defects by the mechanic who performs unauthorized cutting or
altering. Care should be taken during truss layout to allow for adequate
mechanical clearances so that there will be no need to cut or notch
trusses. Mechanicals subcontractors should be made aware of these
cautions. If trusses have been cut, altered or installed incorrectly,
contact Open Joist Engineering immediately at 1-800-584-5191.
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Rafter Cut – 8-1/2 and Steeper Pitch - DWG / PDF |
Universal Forest Products Eastern Division, Inc. manufactures the Open Joist™ product as a licensee of Distribution Open Joist 2000, Inc. All Open Joist product design and engineering calculations are created by the licensor, Distribution Open Joist 2000, Inc.
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