In order to inform the industry of the terms and expressions used by Materials Control Section and applicable to fabricators, the following definitions and abbreviations are adopted.

Structural steel Any steel identified in UBC Standard 22-1
Sheet steel Steel 3/16 inch or thinner in thickness and, when welded, is regulated by AWS D1.3
Rebar Any material that conforms to Building Code Section 1903.5.1 except prestress tendons

Note: Rebar and non-ferrous metals are subject to additional requirements and not part of an approval unless listed with the primary classification.

Type I fabricabor The personnel and equipment at a specific location which has been authorized to do work which, if done at a construction site, would be subject to certain inspection requirements of the Los Angeles Municipal Code.
Type II fabricator This classification has been omitted by the Department as no longer within the scope of authority. The standards for a Type II license have been assumed by the State of California.

The following list has been established to standardize the symbols used to identify product process and materials used by Licensed Fabricators.

AL Aluminum
GFRC Glass Fiber Reinforced Concrete
GL Glue Laminated Wood Products
HSS High Strength Steel
LG Light Gauge
LVL Laminated Veneer Lumber
LWS Light Weight Steel (1/8" to 1" in thickness)
MWS Medium Weight Steel (1/8" to 2" thickness)
PC Pre-Cast Concrete
RB Rebar
RM Ready Mixed Concrete
SPC Specialty (description of specialty follow abbreviation)
SST Stainless Steel
USS Unlimited Structural Steel (1/8" minimum thickness. No Maximum)
WT Wood Trusses

Speciality classifications are too numerous to list, however, a few of the more common classifications are:
Vaults; Sandwich Panels; Walk-in Coolers; Signs; Stairs; Canopies; Handrails & Guardrails; Pallet Racks; Framing Hardware; Window Washing Equipment; Monopoles; Towers.