• Codes
  • Features

    Features Overview

    Go to features
    Reference

    Reference.

    A reliable and up-to-date source of codes.
    Research

    Research.

    Rapidly and efficiently calculate project parameters.
    Collaboration

    Collaboration.

    Get everyone on the same page and streamline code research.
    Workflows
    Architects General Contractor Building Official & Plans Examiner Inspectors Owner Subcontractors Code Consultants
  • Pricing
  • Login
  • Sign Up
Sign Up
Login
  • Code Library
  • Features
  • Pricing
  • About
  • Careers
  • Help
  • Contact
  • Terms
  • Privacy
Sign Up
Upgrade to Premium
Code calculators: Code Calculators automatically generates a detailed list of requirements.
REFERENCE
Amendment Styling
Industry-leading search
Suggested code sections
Code diagrams
RESEARCH
Code calculators
Filter by topic
Code compare
Code sheet exports
COLLABORATION
Team projects
Bookmarks
Comments
START 2 WEEK FREE TRIAL
Have an account? Sign in
// CODE SNIPPET

Section 1709 Connections to Wall Below

2017 FBC - Existing Building, 6th edition > 17 Retrofitting > 1709 Connections to Wall Below
JUMP TO FULL CODE CHAPTER

1709.1 Requirements

Along gable ends where primary studs are longer than 3 feet (914 mm), gable end walls shall be connected to the wall below using the methods prescribed in Section 1709.1.

1709.1.1 Truss Gable End Wall

Truss gable end walls shall be attached to the wall below using gusset angle brackets fastened to the bottom chord of roof trusses and to the wall below and spaced in accordance with Table 1704.1. Fasteners shall be placed a minimum of 5/8 inch (15.875 mm) from edges of lumber. Fasteners shall be permitted to penetrate truss plates. Four fasteners shall be effectively installed through each leg of gusset angles.

Exception: Where existing conditions prevent effective installation of all four fasteners into each leg of a gusset angle bracket, a supplementary gusset angle bracket shall be installed a minimum of 23/4 inches (70 mm) from and a maximum of 8 inches (203 mm) from the one without the four fasteners in each leg. The number of effectively installed fasteners securing the corresponding leg of the supplementary gusset angle bracket shall at least equal the number not effectively installed on the first gusset angle bracket.

1709.1.1.1 Wood Frame Wall Below

Where the wall below a gable end is a wood frame wall, a gusset angle bracket specified by the manufacturer for lumber-tolumber applications shall be installed using fasteners of the same type supplied/specified by the manufacturer. Fasteners installed in top plates shall extend through the full depth of the lowest top plate.

1709.1.1.2 Concrete or Masonry Wall Below

Where the wall below a gable end wall is a concrete or masonry wall, connections shall be by one of the following methods.

1709.1.1.2.1

Where the wall below does not have a sill plate on top of the bond beam, a gusset angle bracket specified by the manufacturer for lumber-toconcrete or lumber-to-masonry applications shall be installed directly to the concrete or masonry of the wall below and to the bottom chord of the truss.

1709.1.1.2.2

Where there is a sill plate of any thickness on top of the bond beam a gusset angle bracket specified by the manufacturer for lumber-to-concrete or lumber-to-masonry applications shall be installed on the sill plate with fasteners passing vertically through the gusset angle bracket and sill plate and connecting directly into the concrete or masonry wall below. Fasteners of the same diameter and style supplied/specified by the gusset manufacturer shall be installed that have sufficient length to penetrate the sill plate and embed into the concrete or masonry to the same depth provided by the fasteners supplied/specified by the gusset angle bracket manufacturer for installation directly into concrete.

1709.1.1.2.3

Where there is a sill plate on top of the bond beam that is a minimum 11/2 inches (38 mm) thick, a gusset angle bracket specified by the manufacturer for lumber-to-lumber applications shall be fastened to the sill plate. Gusset angle brackets shall be fastened to the sill plate using four each 11/2-inch (38 mm) long fasteners of the same type supplied/ specified by the gusset angle manufacturer for wood connections. Regardless of how well the sill plate may be attached to the wall, it shall be anchored to the wall below on each side of the gusset angle bracket using concrete screws of the same type and size and number as those supplied/specified by the gusset manufacturer for concrete or masonry connections. They shall be embedded into the concrete or masonry to the same depth intended for the fasteners supplied/specified by the manufacturer of gusset angles installed in concrete. Washers of minimum 3/8-inch (9.5 mm) diameter shall be placed under heads of those fasteners. Fasteners shall be placed a minimum of 23/4 inches (70 mm) and a maximum of 8 inches (203 mm) from the required gusset angle bracket.

1709.1.2 Platform Framed Gable End Wall

Conventionally framed gable end walls shall be attached to the wall below in accordance with one of the following methods.

1709.1.2.1 Stud Connections

The bottom end of each primary stud of gable end walls shall be connected to bottom members using one of the following methods.

  1. Where a sill plate for the gable end wall exists, the bottom end of each primary stud shall be connected to the sill plate using a stud-to-plate metal connector with minimum uplift capacity of 175 pounds (79 kg).
  2. Where a wood frame gable end wall has a ceiling joist as the lowest outer member of the gable end wall, the primary studs shall be connected to the joist using a stud-to-plate metal connector with minimum uplift capacity of 175 pounds (79 kg) positioned on the wide face of the joist near the top of the joist so that it extends up the stud to where the stud is full width.

1709.1.2.2 Wall Connections

The gable end walls shall be connected to the wall below using one of the following methods.

  1. Where there is a wood frame wall below a gable end wall and where the gable end wall above has a sill or bottom plate atop the plates of the wall below, the sill of the gable end wall shall be connected to the top plates of the wall below using wood screw fasteners with a minimum shear capacity of 150 pounds (667 N) for 11/2-inches (38 mm) side member thickness. Threads of screws shall substantially engage the lower top plate. Screws shall be placed a minimum of 13/4 inches (44 mm) from the edges of lumber and a minimum of 23/8 inches (60 mm) from the ends of lumber. The screws shall be installed at the spacing indicated in Table 1704.1.
  2. Where a wood frame gable end wall has a ceiling joist as the lowest outer member of the gable end wall, that joist shall be connected to the wall below using the method found in Section 1709.1.1 except the ceiling joist shall be attached to the wall below as required for the bottom chord of the roof truss.
  3. Where the wall below a gable end wall is a concrete or masonry wall, the sill or bottom plate of the gable end wall shall be connected to the wall below using 1/4-inch diameter concrete or masonry screws of the same type used for gusset angles and of sufficient length to provide a minimum embedment of 11/2 inches (38 mm) into the concrete of the wall or a minimum 23/4 inches (70 mm) into the masonry of the wall. A washer sized for the diameter of the lag bolt or wood screw shall be placed under the head of each lag bolt. The fasteners shall be installed at the spacing indicated in Table 1704.1.

1709.1.3 Balloon Framed Gable End Wall

The retrofits presented in this chapter are specifically intended for platform framed gable end walls and do not apply to balloon framed gable end walls.

Related Code Sections


Section 1709 Retrofitting, Connections to Wall Below
Along gable ends where primary studs are longer than 3 feet (914 mm), gable end walls shall be connected to the wall below using the methods ...
2014 FBC - Existing Building, 5th edition > 17 Retrofitting > 1709 Connections to Wall Below
Section 1709 Retrofitting, Connections to Wall Below
Along gable ends where primary studs are longer than 3 feet (914 mm), gable end walls shall be connected to the wall below using the methods ...
2017 FBC - Existing Building, 6th edition > 17 Retrofitting > 1709 Connections to Wall Below
Section 1709 Retrofitting, Connections to Wall Below
Along gable ends where primary studs are longer than 3 feet (914 mm), gable end walls shall be connected to the wall below using the methods ...
2020 FBC - Existing Building, 7th edition > 17 Retrofitting > 1709 Connections to Wall Below
1709.1.1 Retrofitting, Truss Gable End Wall
below a gable end wall is a concrete or masonry wall, connections shall be by one of the following methods ...
2020 FBC - Existing Building, 7th edition > 17 Retrofitting > 1709 Connections to Wall Below > 1709.1 Requirements > 1709.1.1 Truss Gable End Wall
1709.1.2 Retrofitting, Platform Framed Gable End Wall
gable end walls shall be connected to the wall below using one of the following methods. Where there is a wood frame wall below a gable end wall ...
2014 FBC - Existing Building, 5th edition > 17 Retrofitting > 1709 Connections to Wall Below > 1709.1 Requirements > 1709.1.2 Platform Framed Gable End Wall
Help Contact Us Privacy Terms
Shared projects
Shared projects
Projects provide a dedicated space to collaborate on code research.
Code Calculators
Code Calculators
Code calculators automatically generate a detailed list of requirements.
Code Compare
Code Compare
Highlight differences between any two building codes.
Code sheet exports
Code sheet exports
Generate a code sheet that integrates with your drawing set.
Search
Search
Don't miss relevant code. Quickly locate sections across your jurisdiction.
Code diagrams
Code diagrams
Unpack the code through illustrations and descriptions.
UpCodes Premium
Leverage the most sophisticated code compliance platform.
TRY FREE FOR TWO WEEKS VISIT PRICING
UpCodes Premium
Leverage the full code compliance platform.
START 2 WEEK FREE TRIAL LEARN MORE