S1402_TERRAZZO_DECK_COVERING_INSTALLATION.pdf

October 1, 1993 (5/95)

NOAA Standard Specification - S1402

TERRAZZO DECK COVERING INSTALLATION

SNUM 140

1. INTENT

1.1 To establish the procedure for installing terrazzo decks on ships of the NOAA Fleet.

2. REFERENCES

2.1 (a) MIL-D-3134

(b) STEEL STRUCTURES PAINT COUNCIL (SSPC) STANDARDS

3. GOVERNMENT FURNISHED MATERIAL

3.1 None

4. REQUIREMENTS

4.1 Plug all openings in deck to preclude fouling of drains.

4.1.1 Remove existing deck covering and thoroughly scale

and power brush deck and cove/border areas to bare steel.

Surface preparation to meet o exceed SSPC #3 of Reference (b).

4.2 Install CRES rings around each deck drain. Rings to be

approximately 3/8" high and continuous welded. A CRES spacer shall be provided under each drain grating to provide a flush fit with installed terrazzo.

** CHECKPOINT ** Surface Inspection

4.3 Inspect area to be covered. Verify area is clean, rust

removed and drain rings installed. Verify drains are plugged to preclude entry of foreign material.

4.4 Apply one coat of Epoxy primer conforming to MIL-P-24441, Formula 150, 2-4 MILS DFT.

4.5 Terrazzo conforming to Type 1, Class 1 of Reference (a)

shall be installed to a minimum thickness of 3/8" above the surface of the deck. Maximum thickness shall be 1/2"

4.5.1 To provide slope for proper drainage a waterproof

underlayment, latex mastic cement type, may be used.

4.5.2 A 4" high cove with a 2" radius shall be installed.

Touch up paint above cove to match existing paint.

Terrazzo Deck Covering Installation S1402

4.5.3 Divider strips of brass shall be imbedded in the

terrazzo and set at the proper level to ensure that the tops of the strips will show uniformly after grinding and finishing operations are completed. End joints and inter-sections shall be fitted tight.

4.5.3.1 The terrazzo installation shall be divided

into squares or rectangles of uniform size and not more than 4' on a side. Borders shall be divided by strips to coincide with deck layout.

4.5.3.2 Installation will be in accordance with

manufacturer's instructions. The top surfaces shall be ground smooth. Temperature shall be maintained above 55/F (13/C) during installation.

4.5.4 Prior to grinding, all drains, parts and equipment

shall be protected from dust/material infiltration.

4.5.5 Grout shall be added to fill small pores.

4.6 Allow 48 hours for material to cure before grinding. Wet

grind to prevent dust.

4.7 After grinding apply 2 coats of sealer (MIL-SPEC MIL-S-

24522) with a minimum drying time of 2 hours between coats.

** CHECKPOINT ** FINAL INSPECTION

4.8 Verify terrazzo installation, clear drains, compartment

cleanliness.

4.9 If yard work is not complete, high traffic areas are to be protected by covering with plywood or cardboard. Low traffic areas to be protected with cardboard.