Technical Bulletins
Technical Bulletins (TB) clarify the application and interpretation of code requirements, policies or procedures.
Updates to TBs
DSD continuously updates its publications to align with the latest building codes, construction practices, safety standards, design guidelines and regulatory changes. Here is a summary of the most recently updated TBs:
Technical Bulletin Search
Approval of Building Product Listing and Evaluation Agencies
The purpose of this technical bulletin is to outline the criteria for acceptance of products, materials, assemblies, and equipment specified for construction of buildings, as well as to outline criteria for recognizing listing agencies.
Revised
Testing and Inspections for Proof of Compliance
The purpose of this bulletin is to establish procedures to provide proof of compliance when there is evidence that any material or construction does not conform to the requirements of the California construction standard codes (the Codes).
Revised
Exemptions from Special Inspection for Minor Work
The purpose of this Technical Bulletin is to clarify when work is of a minor nature so as not to warrant periodic or continuous special inspection.
Revised
Return Air Duct Through Garage/Dwelling Separations
This Technical Bulletin clarifies construction requirements for plenums used as return air for forced air units (FAUs). These requirements apply to air duct penetrations through the fire-rated wall separating a dwelling unit from a private garage.
Revised
Fire Separation Requirement for Parking Under Overhang
The purpose of this Technical Bulletin is to describe fire resistive separation requirements when a residential occupancy cantilevers over a parking space.
Revised
Determination of Building Height in the Coastal Height Limitation Overlay Zone
The purpose of this Technical Bulletin is to illustrate how building height is determined for buildings and structures located in the Coastal Height Limitation Overlay Zone (also referred to as Proposition). Costal height limitation overlay zone shall be referred to a costal zone herein after.
Revised
Impact Protection for Fire-Resistant Columns
This Technical Bulletin describes some acceptable methods of protecting the fire-resistive covering of columns that are subject to impact.
Revised
Design and Testing Requirements for Smoke Control Systems
The purpose of this Technical Bulletin is to provide the smoke control guidelines and requirements to the building permit applicant. This bulletin also describes the minimum requirements for smoke control design and special inspection.
Revised
Maximum Floor Area Allowances Per Occupant
This Technical Bulletin details the maximum floor area allowances per occupant for various spaces.
Revised
Floor and Wall Finishes in Toilet, Bath and Shower Spaces
This technical bulletin provides information on acceptable floor finishes and wall finishes in toilet, bath and shower spaces.
Revised