ROSELYN R. BAR
LIMITED POWER OF ATTORNEY FOR
SECTION 16 REPORTING OBLIGATIONS
      Know all by these presents, that the undersigned hereby makes,
constitutes and appoints M. Guy Brooks, III,  acting individually, as
the undersigned?s true and lawful attorney-in-fact, with full power and
authority as hereinafter described on behalf of and in the name, place
and stead of the undersigned to:
      (1)	prepare, execute, acknowledge, deliver and file Forms 3,
4, and 5 and any related documents, including Form 144 (including amendments
 to any of the foregoing) with respect to the securities of Martin Marietta
Materials, Inc., a North Carolina corporation (the ?Company?), with the United
States Securities and Exchange Commission, any national securities exchanges
and the Company, as considered necessary or advisable under Section 16(a) of
the Securities Exchange Act of 1934 and the rules and regulations promulgated
thereunder, as amended from time to time (the ?Exchange Act?);
      (2)	seek or obtain, as the undersigned's representative and on the
undersigned's behalf, information on transactions in the Company's securities
from any third party, including brokers, employee benefit plan administrators
and trustees, and the undersigned hereby authorizes any such person to release
any such information to the undersigned and approves and ratifies any such
release of information; and
      (3)	perform any and all other acts which in the discretion of such
attorney-in-fact are necessary or desirable for and on behalf of the
undersigned in connection with the foregoing.
      The undersigned acknowledges that:
      (1)	this Power of Attorney authorizes, but does not require, each
such attorney-in-fact to act in their discretion on information provided to
such attorney-in-fact without independent verification of such information;
      (2)	any documents prepared and/or executed by either such attorney-
in-fact on behalf of the undersigned pursuant to this Power of Attorney will
be in such form and will contain such information and disclosure as such
attorney-in-fact, in his or her discretion, deems necessary or desirable;
      (3)	neither the Company nor either of such attorneys-in-fact
assumes (i) any liability for the undersigned's responsibility to comply with
the requirement of the Exchange Act, (ii) any liability of the undersigned for
any failure to comply with such requirements, or (iii) any obligation or
liability of the undersigned for profit disgorgement under Section 16(b) of
the Exchange Act; and
      (4)	this Power of Attorney does not relieve the undersigned from
responsibility for compliance with the undersigned?s obligations under the
Exchange Act, including without limitation the reporting requirements under
Section 16 of the Exchange Act.
      The undersigned hereby gives and grants each of the foregoing
attorneys-in-fact full power and authority to do and perform all and every act
and thing whatsoever requisite, necessary or appropriate to be done in and
about the foregoing matters as fully to all intents and purposes as the
undersigned might or could do if present, hereby ratifying all that each such
attorney-in-fact of, for and on behalf of the undersigned, shall lawfully
do or cause to be done by virtue of this Limited Power of Attorney.
      This Power of Attorney shall remain in full force and effect until
revoked by the undersigned in a signed writing delivered to each such
attorney-in-fact.
      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of this 27th day of May, 2014.

					_/s/ Roselyn R. Bar_________________
					ROSELYN R. BAR


STATE OF NORTH CAROLINA)
				        )
COUNTY OF WAKE		        )


	On this 27th day of May, 2014, Roselyn R. Bar personally appeared
before me, and acknowledged that she executed the foregoing instrument for
the purposes therein contained.
      IN WITNESS WHEREOF, I have hereunto set my hand and official seal.


_/s/ Robin Gracia Joyce________________
Notary Public

My Commission Expires:_10-23-16______



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