Exhibit 12.01

Martin Marietta Materials, Inc. and Consolidated Subsidiaries

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

For the nine months ended September 30, 2011

(add 000, except ratio)
	Martin Marietta
EARNINGS:
Earnings before income taxes *	$	87,430
Loss from less than 50%-owned associated companies, net		1,319
Interest expense **		45,284
Portion of rents representative of an interest factor		15,660
Adjusted Earnings and Fixed Charges	$	149,693
FIXED CHARGES:
Interest expense **	$	45,284
Capitalized interest		1,300
Portion of rents representative of an interest factor		15,660
Total Fixed Charges	$	62,244
Ratio of Earnings to Fixed Charges		2.40

* Represents earnings from continuing operations less net earnings attributable to noncontrolling interests.

** Interest expense excludes interest income of $153 related to the reversal of interest accruals for uncertain tax positions.

Martin Marietta Materials, Inc. and Consolidated Subsidiaries

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

For the nine months ended September 30, 2010

(add 000, except ratio)
	Martin Marietta
EARNINGS:
Earnings before income taxes *	$	108,689
Loss from less than 50%-owned associated companies, net		1,247
Interest Expense **		51,540
Portion of rents representative of an interest factor		15,581
Adjusted Earnings and Fixed Charges	$	177,057
FIXED CHARGES:
Interest expense **	$	51,540
Capitalized interest		1,395
Portion of rents representative of an interest factor		15,581
Total Fixed Charges	$	68,516
Ratio of Earnings to Fixed Charges		2.58

* Represents earnings from continuing operations less net earnings attributable to noncontrolling interests.

** Interest expense excludes interest income of $1,258 related to the reversal of interest accruals for uncertain tax positions.

Martin Marietta Materials, Inc. and Consolidated Subsidiaries

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

For the Year Ended December 31, 2010

(add 000, except ratio)
	Martin Marietta
EARNINGS:
Earnings before income taxes *	$	126,044
Loss from less than 50%-owned associated companies, net		2,173
Interest expense **		68,456
Portion of rents representative of an interest factor		19,218
Adjusted Earnings and Fixed Charges	$	215,891
FIXED CHARGES:
Interest expense **	$	68,456
Capitalized interest		2,129
Portion of rents representative of an interest factor		19,218
Total Fixed Charges	$	89,803
Ratio of Earnings to Fixed Charges		2.40

* Represents earnings from continuing operations less net earnings attributable to noncontrolling interests.

** Interest expense excludes $1,327 accrued for the interest component associated with uncertain tax positions.

Martin Marietta Materials, Inc. and Consolidated Subsidiaries

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

For the Year Ended December 31, 2009

(add 000, except ratio)
	Martin Marietta
EARNINGS:
Earnings before income taxes *	$	112,557
Loss from less than 50%-owned associated companies, net		1,313
Interest expense **		73,460
Portion of rents representative of an interest factor		17,301
Adjusted Earnings and Fixed Charges	$	204,631
FIXED CHARGES:
Interest expense **	$	73,460
Capitalized interest		1,010
Portion of rents representative of an interest factor		17,301
Total Fixed Charges	$	91,771
Ratio of Earnings to Fixed Charges		2.23

* Represents earnings from continuing operations less net earnings attributable to noncontrolling interests.

** Interest expense excludes interest income of $343 related to the reversal of interest accruals for uncertain tax positions.

Martin Marietta and Consolidated Subsidiaries

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

For the Year Ended December 31, 2008

(add 000, except ratio)
	Martin Marietta
EARNINGS:
Earnings before income taxes *	$	243,635
(Earnings) Loss from less than 50%-owned associated companies, net		190
Interest expense **		74,299
Portion of rents representative of an interest factor		19,727
Adjusted Earnings and Fixed Charges	$	337,851
FIXED CHARGES:
Interest expense **	$	74,299
Capitalized interest		3,692
Portion of rents representative of an interest factor		19,727
Total Fixed Charges	$	97,718
Ratio of Earnings to Fixed Charges		3.46

* Represents earnings from continuing operations less net earnings attributable to noncontrolling interests.

** Interest expense excludes interest income of $1,247 related to the reversal of interest accruals for uncertain tax positions.

Martin Marietta Materials, Inc. and Consolidated Subsidiaries

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

For the Year Ended December 31, 2007

(add 000, except ratio)
	Martin Marietta
EARNINGS:
Earnings before income taxes *	$	376,035
(Earnings) Loss from less than 50%-owned associated companies, net		(2,748	)
Interest expense **		60,893
Portion of rents representative of an interest factor		22,244
Adjusted Earnings and Fixed Charges	$	456,424
FIXED CHARGES:
Interest expense **	$	60,893
Capitalized interest		3,873
Portion of rents representative of an interest factor		22,244
Total Fixed Charges	$	87,010
Ratio of Earnings to Fixed Charges		5.25

* Represents earnings from continuing operations less net earnings attributable to noncontrolling interests.

** Interest expense excludes $12 accrued for the interest component associated with uncertain tax positions.

Martin Marietta Materials, Inc. and Consolidated Subsidiaries

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

For the Year Ended December 31, 2006

(add 000, except ratio)
	Martin Marietta
EARNINGS:
Earnings before income taxes *	$	350,733
(Earnings) Loss from less than 50%-owned associated companies, net		(1,963	)
Interest expense		40,359
Portion of rents representative of an interest factor		11,332
Adjusted Earnings and Fixed Charges	$	400,461
FIXED CHARGES:
Interest expense	$	40,359
Capitalized interest		5,420
Portion of rents representative of an interest factor		11,332
Total Fixed Charges	$	57,111
Ratio of Earnings to Fixed Charges		7.01

* Represents earnings from continuing operations less net earnings attributable to noncontrolling interests.