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READ AND **REMOVE THIS PAGE** BEFORE PLACING

THE SPECIFICATION SECTION IN THE CONTRACT

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[DIVISION 4: MASONRY]{.underline}

SECTION 04856 ‑ STONE VENEER

USE: Furnishing and installing stone wall facing.

**NOTES TO SPECIFIER:**

A. Options within paragraphs are identified by enclosure in brackets;
blank spaces enclosed by brackets \[\_\_\_\_\_\] provide for information
to be inserted, as appropriate, to individual projects.

B. **TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES,** the
specifier must edit (delete, substitute or add to the text). The
remaining paragraphs must be renumbered.

C. DELETE FOR FINAL COPY: Notes to the Specifier, located between lines
of asterisks; all \[brackets\], [underlining]{.underline}, **boldface**,
and *italics*, within the paragraphs; and this page. (Open Reveal Codes
\[alt F3\] to do this accurately.)

D. [To Edit "(Footer B)":]{.underline} (Corel 8). **ENTIRE FOOTER SHOULD
BE BOLDED.** Click in the footer and delete the "Project Name (ftr B)"
text and replace it with the **Name of the Project (upper and lower
case)**. Replace date with current MM/YY (WITHOUT BRACKETS).

E. The Guide Specifications are intended to be continuously reviewed and
revised. User's technical comments are appreciated. Also, other related
or similar specification that are written "from scratch" that could
benefit others, or other questions can be sent to NSTC A/E Group, ST
110, or call (303) 987-6868.

**DRAWING DATA REQUIRED:**

**REVISIONS OF THIS SECTION:**

CSI format, editorial changes: 12/01

Metric:

Technical Update: 1/94

**SECTION 04856**

**STONE VENEER**

**[PART 1: GENERAL]{.underline}**

**1.1 SUMMARY**

**A. Section Includes: Furnishing and installing natural stone veneer
and related items necessary to complete the work.**

**1.2 SUBMITTALS**

**A. General: Submittals shall be according to \[Section 01009 - General
Information and Requirements.\] \[and\] \[Section 01330 - Submittal
Procedures.\] \[and\] \[Section 01331 - Certificates.\]**

**B. Test Reports: Submit \[ \] copies of written documentation of
absorption by weight, density, compressive strength and modulus of
rupture that the stone meets specified requirements. Test will be
according to established ASTM test methods and shall be performed by a
certified independent testing laboratory.**

**C. Mill Test Reports: Submit \[ \] copies of each shipment of Portland
Cement.**

**D. Samples**

** 1. Submit \[ \] stone samples for each of the required height size
ranges. Samples shall be approximately 8 inches long and 4 inches wide
and be in the color and texture noted below.**

** 2. Submit \[five\] strap tie anchors to be used on this project.**

**1.3 QUALITY ASSURANCE**

**A. Samples Panels **

** 1. Construct a sample panel by dry stacking natural stones to
simulate and show color range, height size ranges and texture. This dry
stacked panel shall be a minimum of 5 feet by 5 feet and be approved by
the CO. Changes may be required before final approval. This sample panel
is to remain until an entire mortared wall is approved.**

** 2. Construct a sample wall panel a minimum of 4 feet by 4 feet;
simulating the dry stacked panel showing mortar joints, bonds,
horizontal layers and vertical facing. A second mortared sample wall
panel may be required to achieve approval by the Contracting Office.
Sample wall(s) shall not be built as part of the structure. The approved
mortared wall shall be used as the standard of comparison for all stone
veneer work. Do not alter, move, or destroy panel until the work is
completed.**

**[PART 2: PRODUCTS]{.underline}**

**2.1 MATERIALS**

**A. Natural Building Stone Veneer: Reference ASTM C 119. Natural
building stone shall include stone that is either sawed, cut, split or
otherwise finished or shaped, and shall specifically exclude molded,
cast, or otherwise artificially aggregated units composed of fragments,
and also crushed or broken stone.**

**B. Physical Requirements: Stone supplied shall meet or exceed all four
of the minimum physical property requirements as determined by the
specific SDTM test method as specified below.**

** 1. Absorption By Weight: Maximum of 5 percent; according to ASTM C
97.**

**2. Density: Minimum of 140 pounds per cubit foot; according to ASTM C
97.**

** 3. Compressive Strength: Minimum of 10,000 psi; according to ASTM C
170.**

** 4. Modulus of Rupture: Minimum of 750 psi; according to ASTM C 99.**

** 5. Stone Size Range: Lengths shall be random and similar to
indications shown on the drawings. Height ranges shall be of the
following approximate percentages:**

** [Stone Height]{.underline}[ ]{.underline}[ ]{.underline}[
]{.underline}[Percent of Total]{.underline}**

**[ ]{.underline}[ ]{.underline} 1-1/2 inch (38 mm) 10**

**[ ]{.underline}[ ]{.underline} 2-1/2 inch (64 mm) 10**

** 4 inch (102 mm) 20**

** 5 inch (127 mm) 20**

** 6 inch (152 mm) 40**

** 6. Stone Color: Stones shall be selected for attractive appearance
and a color. Colors shall range form light buff to tan. It is suggested
that the Contractor view examples located at the BLM office in
Albuquerque, New Mexico prior to obtaining samples for submittals.**

** 7. Stone Pattern: The finished stone facing shall be random, broken
coursed ashlar. Stones shall be sound, hard, and well shaped with no
mechanical scars or tooling showing on the exterior natural strata
faces.**

**C. Mortar: See Section 04101 - Cement and Lime Mortars.**

**D. Strap Ties: Shall be 22 ga minimum galvanized corrugated sheet
metal 7 x 7/8 inches.**

**E. Water: Clean, potable and free from injurious amounts of acid
alkalis, organic materials, or other harmful materials.**

**[PART 3: EXECUTION]{.underline}**

**3.1 EXAMINATION**

**A. Verification of Conditions: Inspect details of materials adjacent
to stonework for articles to be built into stonework as it is laid up.**

**B. Quantity of Stone: Ensure that plenty of stone is on site at all
times for proper sizing and color selection.**

**3.2 INSTALLATION**

**A. Strap Ties: Stone veneer shall be attached to the building wall
with galvanized sheet metal strap ties spaced a maximum of 16 inches oc
each way.**

**B. Edges: When exterior masonry abuts a vertical or horizontal
surface, individual stones shall be picked which facilitate the
installation of caulking bead and mortar joint.**

**C. Protection: Protect uncompleted walls be covering at the end of
each workday and for shutdown periods. The cover shall be a strong,
securely attached, non-staining weather resistant membrane overhanging
stonework by at least 24 inches. When work resumes, clean top surface of
stone of loose mortar and thoroughly dampen. Where new masonry joins
partially or totally set masonry, remove loose mortar and dampen.**

**D. Face Appearance: Exposed faces of stone shall be weathered. Broken
faces exposed to view are not acceptable. Lay stones so face with most
figuring or lichen/moss (in that order of priority) is exposed. Stones
having equal faces shall be laid with darker face exposed.**

**E. Procedure**

** 1. Construct walls to the same standard as the approved mortared
sample wall.**

**2. Thoroughly wet stones before laying.**

**3. Set each stone on its natural bed, level, and true to line, in a
full bed of mortar; tap to full, even bearing. Fill joints with mortar
leaving no voids. Mortar shall be slushed in the space between the back
facing of the stone and the concrete masonry wall. Keep exterior faces
of stone free of mortar.**

** 4. Set stones vertically starting at the bottom of each wall on the
ledge provided.**

** 5. Build all walls straight and plumb on the exterior face.**

** 6. Lay stones informally with broken joints and a mixture of the
various sizes.**

** 7. Make joints a minimum of 3/8 inch, to a maximum of approximately
3/4 inch, and fill with mortar.**

** 8. Stone joints shall be slightly concave; point with cement when
mortar is nearly dry. After pointing joints, rub with a stiff broom or
brush to remove trowel sheen. Fill holes and joints, and cut out
defective joints and repaint where necessary.**

** 9. Set only the stones that will remain in place without slipping.**

**10. Work horizontally across the wall to allow stones to set before
applying additional stones above them.**

**11. After completion, thoroughly clean and scrub stone with stone
fiber brushes using mild soap and water, and completely rinse
immediately after scrubbing. Begin at the top and work down. Take care
to preserve lichen or moss if applicable.**

**3.3 PROTECTION**

**A. Requirements **

**1. Protect stone faces against staining.**

**2. Keep stones as clean as possible.**

**3. No soil backfill shall be placed against stone for a minimum of 14
days or until stone is completed and cleaned.**

**4. Aesthetic appearance, color and pattern are important. Experienced
natural stone masons should be utilized in construction of stone veneer
walls.**

**[PART 4: MEASUREMENT AND PAYMENT]{.underline}**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**WHEN A \"LUMP SUM\" CONTRACT IS USED, DELETE THE TITLE PART 4:
MEASUREMENT AND PAYMENT, AND BOTH ARTICLES FROM THIS SPECIFICATION
SECTION. MEASUREMENT AND PAYMENT WILL BE ADDRESSED IN PART 4 OF SECTION
01009 - GENERAL INFORMATION AND REQUIREMENTS OR SECTION 01010 - SUMMARY
OF WORK.**

**WHEN NOT A "LUMP SUM" CONTRACT, SELECT THE APPLICABLE PHRASES; USE THE
"NO MEASUREMENT" PHRASE WHEN THE PAY ITEM IN THIS SECTION IS NOT
INCLUDED IN THE BID SCHEDULE.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**4.1 METHOD OF MEASUREMENT**

**A. Units: The work described in this section will \[not be measured
for payment.\] \[be measured and paid for on a lump sum basis.\]**

**4.2 BASIS OF PAYMENT**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**WHEN NOT A "LUMP SUM" CONTRACT, SELECT APPLICABLE PHRASES; USE THE "NO
DIRECT PAYMENT" PHRASE WHEN THE PAY ITEM IN THIS SECTION IS NOT INCLUDED
IN THE BID SCHEDULE.**

WHEN NOT A "LUMP SUM" CONTRACT AND PAYMENT IS TO BE MADE UNDER THIS
SECTION, SELECT THE PAY ITEM. DO NOT CHANGE THE PAY ITEM NUMBER.

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**A. Payment: \[o direct payment for the work described under this
section will be made. Consideration for this item shall be included in
the bid price for other items of the Contract.\] \[Prices and payment
will be full compensation for the work described in this section.
Payment will be made under:\]**

** [Pay Item]{.underline} [ ]{.underline}[ ]{.underline}[ ]{.underline}[
]{.underline}[ ]{.underline}[ ]{.underline}[ ]{.underline}[
]{.underline}[ ]{.underline}[Pay Unit]{.underline}**

** 04856(01) Stone Veneer Lump Sum**

**END OF SECTION**