Rebar Alternatives Save Big $$$

Contact Us

Fill out the form below to request more information from our Bladensburg location.

"*" indicates required fields

Consent*
Hidden
This field is for validation purposes and should be left unchanged.

View our privacy policy

MD: Bladensburg (HQ)

(301) 927-8300

4700 Annapolis Road, Bladensburg, MD 20710, USA

Mon-Fri 6:30AM to 4:00PM Saturday 6:30AM to 12:00PM Sunday CLOSED

Get In Touch with someone at MD: Bladensburg (HQ)
(301) 927-8300

"*" indicates required fields

Accepted file types: pdf, txt, Max. file size: 2 MB.
Hidden
Response time within 4 hours

CMU Fire Rating Chart

Ted Kelly | September 3, 2015

Ernest Maier CMU Complying with IBC 2003

Equivalent Thickness Table 6.0 – Tek Note 7.01D

2005 Supplement

Fire Resistance Nominal Size ASTM Solid Materials Equivalent Thickness (in)
½ Hour 2x8x16

3x8x16*

C-145

C-90

100%

79%

1.9

1.9

¾ Hour 4x8x16

3x8x16

C-90

C-145

65%

100%

2.4

2.6

1 Hour 4x8x16

4x8x12

4x8x16*

C-90

C-90

C-145

79%

73%

78%

2.7

2.7

2.8

1 ½ Hours 6x8x16

8x8x16 Normal Weight

C-90

C-90

54%

50%

3.0

3.8

2 Hours 2-1/4×3-3/4×8**

4x8x16

4x8x12

8x8x24***

6x8x16***

8x8x16 Lightweight***

C-55

C-145

C-145

C-90

C-90

C-90

100%

100%

100%

52%

64%

50%

3.6

3.6

3.6

3.7

3.6

3.8

3 Hours 8x8x16

10x8x16

C-90

C-90

63%

50%

4.8

4.8

4 Hours 8x8x16

8x8x12

12x8x12***

12x8x16

6x8x16

8x8x12

8x8x16

C-145

C-145

C-90

C-90

C-145

C-145

C-145

75%

75%

55%

50%

100%

100%

100%

5.7

5.7

5.4

5.6

5.6

7.6

7.6

CMU Fire Resistance Calculator

* BMS 92 – National Bureau Standard

** Concrete Brick

Primary Aggregates – Expanded Shale and/or Pumice

Above Blocks Plastered on One Side with 1/2 inch 1:3 Gypsum and Sand Plaster adds 1/2 Hour to Fire Rating

VP of MasonryTed Kelly

Phone
Location
MD: Bladensburg (HQ)
Languages
English

Latest News

Ernest Maier and Gomoljak Counter Price Sheet

Ernest Maier and Gomoljak Counter Price Sheet

Pricing accurate as of 7/25/2022 and valid for Annapolis, Bladensburg, and Gaithersburg locations (contact us for bulk pricing and delivery): […]

Read More
Extreme Events in Stormwater Regulation

Extreme Events in Stormwater Regulation

Most of the Time vs. Most of the Problems There is a big problem with stormwater regulations. The rules are […]

Read More
2022 Building Code Updates: Fiberglass Rebar

2022 Building Code Updates: Fiberglass Rebar

Fiberglass rebar (in the codes as glass fiber reinforced polymer [GFRP]) is an amazing product that had quite a banner […]

Read More
Brendan Quinn Appointed to CMU Checkoff Board

Brendan Quinn Appointed to CMU Checkoff Board

Brendan Quinn, CEO of Ernest Maier, has been appointed to a 2-year term on the CMU Checkoff Board of Directors. […]

Read More
What Makes Good Aggregate Materials for Concrete and Why are They Important?

What Makes Good Aggregate Materials for Concrete and Why are They Important?

For every construction project that requires concrete, you will need aggregates as filler material for the concrete. Aggregate materials for […]

Read More