• 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
    Architects
    General Contractors
    General Contractors
    Building Official & Plans Examiners
    Building Official & Plans Examiners
    Inspectors
    Inspectors
    Owners
    Owners
    Subcontractors
    Subcontractors
    Code Consultants
    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
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

2508.5 Horizontal Gypsum Board Diaphragm Ceilings

Building Code 2012 of South Holland > 25 Gypsum Board and Plaster > 2508 Gypsum Construction > 2508.5 Horizontal Gypsum Board Diaphragm Ceilings
JUMP TO FULL CODE CHAPTER
Gypsum board shall be permitted to be used on wood joists to create a horizontal diaphragm ceiling in accordance with Table 2508.5.
TABLE 2508.5
SHEAR CAPACITY FOR HORIZONTAL WOOD FRAMED GYPSUM BOARD DIAPHRAGM CEILING ASSEMBLIES
MATERIAL THICKNESS OF MATERIAL
(MINIMUM) (inches)
SPACING OF FRAMING
MEMBERS (MAXIMUM)
(inches)
SHEAR VALUEa, b
(plf of ceiling)
MIMIMUM FASTENER SIZE
Gypsum board 1/2 16 o.c. 90 5d cooler or wallboard nail;
15/8-inch long; 0.086-inch shank;
15/64-inch headc
Gypsum board 1/2 24 o.c. 70 5d cooler or wallboard nail;
15/8-inch long; 0.086-inch shank;
15/64-inch headc
For SI: 1 inch = 25.4 mm, 1 pound per foot = 14.59 N/m.
  1. Values are not cumulative with other horizontal diaphragm values and are for short-term loading due to wind or seismic loading. Values shall be reduced 25 percent for normal loading.
  2. Values shall be reduced 50 percent in Seismic Design Categories D, E and F.
  3. 11/4-inch, No. 6 Type S or W screws are permitted to be substituted for the listed nails.

2508.5.1 Diaphragm Proportions

The maximum allowable diaphragm proportions shall be 11/2:1 between shear resisting elements. Rotation or cantilever conditions shall not be permitted.

2508.5.2 Installation

Gypsum board used in a horizontal diaphragm ceiling shall be installed perpendicular to ceiling framing members. End joints of adjacent courses of gypsum board shall not occur on the same joist.

2508.5.3 Blocking of Perimeter Edges

All perimeter edges shall be blocked using a wood member not less than 2-inch by 6-inch (51 mm by 159 mm) nominal dimension. Blocking material shall be installed flat over the top plate of the wall to provide a nailing surface not less than 2 inches (51 mm) in width for the attachment of the gypsum board.

2508.5.4 Fasteners

Fasteners used for the attachment of gypsum board to a horizontal diaphragm ceiling shall be as defined in Table 2508.5. Fasteners shall be spaced not more than 7 inches (178 mm) on center (o.c.) at all supports, including perimeter blocking, and not more than 3/8 inch (9.5 mm) from the edges and ends of the gypsum board.

2508.5.5 Lateral Force Restrictions

Gypsum board shall not be used in diaphragm ceilings to resist lateral forces imposed by masonry or concrete construction.

Related Code Sections


2508.5 Gypsum Board and Plaster, Horizontal Gypsum Board Diaphragm Ceilings
Gypsum board shall be permitted to be used on wood joists to create a horizontal diaphragm ceiling in accordance with Table 2508.5. TABLE ...
Building Code 2012 of South Holland > 25 Gypsum Board and Plaster > 2508 Gypsum Construction > 2508.5 Horizontal Gypsum Board Diaphragm Ceilings
R702.3.6 Wall Covering, Horizontal Gypsum Board Diaphragm Ceilings
Gypsum board and gypsum panel products shall be permitted on wood joists to create a horizontal diaphragm in accordance with Table R702.3.6. Gypsum ...
Residential Code 2018 of South Holland > 7 Wall Covering > R702 Interior Covering > R702.3 Gypsum Board and Gypsum Panel Products > R702.3.6 Horizontal Gypsum Board Diaphragm Ceilings
R702.3.7 Wall Covering, Horizontal Gypsum Board Diaphragm Ceilings
FOR HORIZONTAL WOOD-FRAMED GYPSUM BOARD DIAPHRAGM CEILING ASSEMBLIES MATERIAL THICKNESS OF MATERIAL (min.) (inch) SPACING OF FRAMING ...
Residential Code 2012 of South Holland > 7 Wall Covering > R702 Interior Covering > R702.3 Gypsum Board > R702.3.7 Horizontal Gypsum Board Diaphragm Ceilings
2508.6.1 Gypsum Board, Gypsum Panel Products and Plaster, Diaphragm Proportions
The maximum allowable diaphragm proportions shall be 1 1 / 2 :1 between shear resisting elements. Rotation or cantilever conditions shall ...
Building Code 2018 of South Holland > 25 Gypsum Board, Gypsum Panel Products and Plaster > 2508 Gypsum Construction > 2508.6 Horizontal Gypsum Board or Gypsum Panel Product Diaphragm Ceilings > 2508.6.1 Diaphragm Proportions
2508.6.2 Gypsum Board, Gypsum Panel Products and Plaster, Installation
Gypsum board or gypsum panel products used in a horizontal diaphragm ceiling shall be installed perpendicular to ceiling framing members. End joints ...
Building Code 2018 of South Holland > 25 Gypsum Board, Gypsum Panel Products and Plaster > 2508 Gypsum Construction > 2508.6 Horizontal Gypsum Board or Gypsum Panel Product Diaphragm Ceilings > 2508.6.2 Installation
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.
Search
Search
Don't miss relevant code. Quickly locate sections across your jurisdiction.
Code Compare
Code Compare
Highlight differences between any two building codes.
Code diagrams
Code diagrams
Unpack the code through illustrations and descriptions.
Code sheet exports
Code sheet exports
Generate a code sheet that integrates with your drawing set.
UpCodes Premium
Leverage the most sophisticated code compliance platform.
VISIT PRICING
UpCodes Premium
Leverage the full code compliance platform.
START 2 WEEK FREE TRIAL PRICING