how to read a Truss Design Drawing - Como Leer un Dibujo del Diseño de Trusses

Oct 24, 2026

Uploaded by Rhys

Truss Design Drawings provide a graphic depiction of wood trusses connected with metal plates, detailing the physical design characteristics needed for safe construction and inspection. The drawings may vary by supplier format, but they consistently present the same fundamental information referenced by the International Building Code and International Residential Code. The content explains geometry, joint locations, bearing and support requirements, lumber dimensions and grades, plate manufacturing and placement, permanent bracing needs, and member force details such as magnitude/direction and the Combined Stress Index.

LanguageEnglish

CategoryHealthcare

FormatPDF

Pages5

Reading Time13 min

AccessFree to download

How to Read Truss Design Drawings

Geometry, Bearings, and Lumber

Plating Information and Permanent Member Bracing

Truss Member Forces

| | | | --- | --- | | | | | | | | | | how to read a Truss Design Drawing Como Leer un Dibujo del Diseño de Trusses Each metal plate connected wood truss has a Truss Design Drawing which is a graphic depiction of the truss that describes the design and physical characteristics of the truss. Truss Design Drawings from different suppliers may be delivered in different formats but they all contain the same basic information as outlined in the International Building Code (section 2303.4. 1) and the International Residential Code (sections R502 .114 for floors and R802 . 10 for roofs) . Truss Design Drawings are a valuable resource for anyone building with or inspecting trusses. Cada truss de madera conectado con láminas de metal tiene un dibujo del diseño de trusses, el que es una representación gráfica del truss que describe el diseño y los característicos físicos del truss. Los dibujos de proveedores diferentes pueden tener formatos diferentes pero todos los dibujos contienen la misma información básica que está embozada en el Código Internacional de Construcción (sección 2303.4. 1) y el Código Internacional de Residencias (secciones R502. 114 para suelos y R802.10 para techos). Los dibujos del diseño de trusses son recursos valiosos para cualquiera persona que utilice los trusses para la construcción o que examine los trusses. a. gEoMETry • Slope or Depth, Span & Spacing • Location of Joints Note: Dimension notations are in feet-inchessixteenths A. GEOMETRÍA • Ángulo de la inclinación o profundidad, tramo y espaciamiento • Ubicación de ensambladura Nota: Notaciones de dimensión están en pies-pulgadas-16 avos de pulgada B. BEarIngs • Bearing or Support Locations • Required Bearing Widths • Mechanical Connection Details (i.e. , hangers) • Magnitude & Direction of Support Reactions B. COJINETES • Ubicaciones de carga o apoyo • Anchos requeridos de los cojinetes • Detalles de las conexiones mecánicas (porejemplo, soportes) • Magnitud y dirección de las reacciones delos soportes C. luMBEr • Nominal Cross Section Dimensions (e.g. , 2x4, 2x6) • Lumber Species • Lumber Grade C. MADERA • Dimensiones nominales de las secciones transversales (por ejemplo, 2x4, 2x6) • Especie de la madera • Calidad de la madera Copyright © 2001-2006 WTCA – Representing the Structural Building Components Industry. All Rights Reserved. TTBDRAWING-20060615 D. plaTIng InforMaTIon • Plate manufacturer • Size of plate for each joint • Gauge of plates (corresponds to thickness) • Dimensioned locations of plates D. INFORMACIÓN SOBRE LA LÁMINA • Fabricante de láminas • Tamaño de la lámina para cada ensambladura • Calibre de las láminas (corresponde al grosor) • Ubicaciones dimensionadas de las láminas E. pErManEnT Truss MEMBEr BraCIng Individual truss members are often subjected to compression forces. To prevent these members from buckling, permanent truss member bracing is sometimes required. If so, the locations and/or spacing will be specified on the Truss Design Drawing. See BCSI-B3 "Web Member Permanent Bracing/Web Rein- forcement" for more detailed information. E. ARRIOSTRE DE LOS MIEMBROS PERMANENTES INTERIORES DEL TRUSS A menudo los miembros individuales del truss aguantan fuerzas de compresión. Para impedir el torcer de los miembros, a veces se requiere la instalación de arriostres en Note: Dimensioned plate locations are sometimes omitted when a plate is to be positioned symmetrically about a joint interface. Nota: A veces se omite las ubicaciones dimensionadas de las láminas cuando se coloca simétricamente unalámina sobre un cruce deensambladuras. los miembros permanentes interiores del truss. Si esté necesario, el Dibujo del Diseño del Truss especifique las ubicaciones y/o los espacios de los arriostres. Consulte BCSI-B3 "Refuerzos yArriostres de los Miembros Secundarios"para información más detallada. f. Truss MEMBEr forCEs Truss Design Dr

FAQs

What information do truss design drawings typically include?

They describe truss design and physical characteristics, including geometry, joint locations, bearing/support data, lumber properties, plate information, permanent bracing requirements, and member force limits.

How are truss dimensions and measurements noted on these drawings?

Dimension notations are given in feet and inches (including sixteenths), as indicated in the drawing guidance.

What is the Combined Stress Index (CSI) used for?

CSI is the ratio of expected maximum axial and bending forces to the member’s required resisting capacity, with a maximum value of 1.00 representing forces near the design limit.

Oct 24, 2026

Uploaded by Rhys