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Montgomery County Building Codes and Standards

The Executive Regulations (also known as Local Amendments) are available in Adobe PDF format. To view or print a copy of the Executive Regulations please click on the appropriate ER number in the table below. For information on previous codes and standards please click on the link near the bottom of this page. For Code Intepretation Policies please click on the appropriate policy in the table at the very bottom of this page. For information not covered here please call 311 or 240-777-0311 if outside Montgomery County.

CODE

CODE/EDITION

EXECUTIVE REGULATIONS  

EFFECTIVE DATE

Accessibility

COMAR 05.02.02, ADAAG & FFHAG

 State Adoption

01-01-2012

Commercial Building

 

 

ICC International Building Code/2012

ER 8-12

07-15-2012

MBRC Maryland Building Rehabilitation Code

 State Adoption

04-01-2013

Commercial Fuel Gas

ICC  International Fuel Gas Code/2012

 ER 8-12

07-15-2012

Commercial Mechanical

 

ICC  International Mechanical Code/2012

ER 8-12

07-15-2012

Electrical

NFPA  National Electrical Code/2008

ER15-09

03-15-2010

 Energy Conservation

 ICC International Energy Conservation Code/2012

 ER 8-12

07-15-2012

Fire Alarm

NFPA72/2007

ER 9-12AM 

7-24-2012

COMAR NFPA 72/2007

 State Adoption Fire Prevention Code

01-01-2013

Life-Safety

NFPA 101/2009

ER 10-12AM 

7-24-2012

COMAR NFPA101/2012

State Adoption Fire Prevention Code

01-01-2013

Plumbing & Gas

WSSC Plumbing Code

 NA

02-01-2011

Residential Building & Mechanical

 ICC  International Residential Code/2012

 ER 8-12

07-15-2012

MBRC Maryland Building Rehabilitation Code

 State Adoption

04-01-2013

Residential Sprinkler

NFPA13D/2007

ER 9-12AM

7-24-2012

COMAR NFPA 13D/2007

 State Adoption Fire Prevention Code

01-01-2013

Commercial Sprinkler

NFPA13R/2007 NFPA13/2007

 ER 9-12AM

 7-24-2012

COMAR NFPA13R/2007 COMAR NFPA 13/2007

State Adoption Fire Prevention Code

01-01-2013

 

*MBRC applies to a building or structure that was erected and occupied or issued a certificate of occupancy at least 1 year before a construction permit application for that building or structure was made to a local jurisdiction.

 **Applies to the construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location,removal and demolition of one- and two-family dwellings and townhouses not more than three stories above grade plane in height with separate means of egress and their accessory buildings/structures.

Residential Construction Design Parameters

Ground Snow Load

Wind Speed

Seismic Design Category

Subject To Damage From

Weathering

Frost Line Depth

Termite

Decay

30 PSF
(1.4 kN/m²)

90 mph
(145 km/hr)

B

Severe

24 in
(610 mm)

Moderate to heavy

Slight to moderate

Winter Design Temp.

Ice Shield Underlayment Required

Flood Hazards

Air Freezing Index

Mean Annual Temp.

13°F(-10.6°C)

Yes

July 2, 1979

300

55°F(12.8°C)

 

Commercial Construction Design Parameters

Ground

Snow

Load (psf)

Risk

Category

Ultimate Design Wind Speed (mph)

Nominal Design Wind Speed (mph)

Mapped Spectral Response Accelerations Expressed as a Percentage of Gravity

 

Wea-thering

 

Frost

Depth

(in)

      Ss

       S1

 

      30

          I

      105

      82

 

    12.5

 

     5.5

 

Severe

 

  30

         II

      115

      89

    III & IV

      120

      93

 

Previously Adopted Codes

 

Building Code Interpretation Policies

Low Voltage Systems BCP11-01
Basement Ceiling Height BCP11-02
Reliable Power Source BCP11-03
Required Permits For Hot Tubs and Spas BCP11-04
Permits for Inflatable Pools BCP11-05
Permits for Metal Storage and Sea Containers BCP11-06
Permits for Tents BCP11-07
Kitchen Hoods for Places of Worship/Day Care BCP11-08
Computer Room Ventilation BCP11-09
Final Inspections for Expired Residential Permits BCP11-10
Green Building Additions BCP11-11
Partial Framing Inspection for Low Framing BCP11-12
Pool Barriers Constructed With Welded Wire Mesh BCP11-13

 

 
Last edited: 1/24/2012