15090.doc

96-620 00-32 07-733 07-743

SECTION 15090 - SUPPORTS, ANCHORS AND BASES

PART 1 GENERAL

1.1

MATERIAL COMPATIBILITY

A.

Hangers, clamps, anchors, guides and other supports in contact with copper or brass pipe and tubing shall be compatible nonferrous material or plastic coated.

B.

All materials shall be free of rust, oil and dirt and shall be suitable for painting. Rusted materials shall be promptly removed from the site.

C.

All hangers, supports and hardware used on this project shall be galvanized or plated. Black steel and painted black steel and painted black steel are not acceptable.

1.2

STANDARDS

A.

The standards of the Manufacturers Standardization Society of the Valve and Fittings Industry (MSS) publications MSS SP-58 and SP-69 shall be met by the materials used on the project.

1.3

CODES

A.

All ductwork and piping shall be provided with seismic restraints in accordance with Seismic Hazard Level (SHL B) of the Seismic Restraint Manual: Guidelines for Mechanical Systems dated 2000, as published by the Sheet Metal and Air Conditioning Contractors National Association, Inc., and in accordance with the 200 International Building Code.

1.4

SUBMITTAL DATA

A.

See SECTION 15000 for general submittal requirements.

B.

Provide manufacturer's literature for all products specified in this Section which will be installed under this project.

1.

Submittal shall be marked to indicate the hanger, support, etc., which is to be used and shall also indicate which system it is to be applied to.

PART 2 PRODUCTS

2.1

ACCEPTABLE MANUFACTURERS

A.

Equivalent products of Fee and Mason, Kindorf, Grinnell, Elcen and Unistrut and B-Line are acceptable.

2.2

ANCHORS

A.

Anchors shall be provided wherever necessary or indicated to localize expansion or to prevent pipe rattle or undue strain on piping. Anchors shall consist of steel collars with lugs and bolts for clamping and attaching anchor braces, unless otherwise indicated.

2.3

HANGERS

A.

Insulated Piping: 3/8" through 4" pipe size, Grinnell Figure 65 adjustable clevis, galvanized.

B.

Uninsulated Piping: 1/2" through 8" size pipe, Grinnell Figure 97C adjustable pipe ring plastic coated.

C.

Cast Iron Pipe: Pipe size through 3", Grinnell Figure 65 adjustable clevis, galvanized.

D.

Cast Iron Pipe: Pipe size larger than 3", Grinnell Figure 590 adjustable clevis, galvanized.

2.4

PROTECTION SADDLES

A.

Hangers for insulated pipe shall utilize Grinnell Fig. 167 protection shield with clevis type hangers and Grinnell Fig. 160 family for pipes supported on rollers and roller hangers. Protection saddles manufactured by the contractor shall not be allowed.

1.

Note that the hanger on insulated pipe must be sized for the insulation diameter.

2.5

TRAPEZE HANGERS AND FLOOR SUPPORTS

A.

Trapeze type of hangers are not allowed for use to support grouped piping systems which are subject to pipe movement from expansion or contraction or systems and/or which require upward or downward slope for air removal or gravity drainage unless they are specifically detailed on the plans or are specifically approved by the Contracting Officer on application.

B.

Trapeze hangers will be allowed to carry non-insulated pipes and conduits which are not subject to movement and which are not required to slope.

C.

Trapeze hangers will not be allowed to carry insulated piping.

D.

Electrical conduits shall not be hung on hangers with service pipe.

E.

Trapeze hangers and floor supports which carry more than one pipe shall be spaced according to the smallest diameter pipe.

F.

Horizontal load bearing members for more than one pipe shall be constructed of zinc coated angle iron or manufactured structural channel similar and equal to zinc coated B-Line series 22. The corners of all supports shall be cut or ground to minimize the chance of injury to personnel. Size horizontal members to carry the pipe load plus 200 lbs.

G.

Pipes shall be secured to every support using zinc-coated U-bolts or clamps.

H.

Floor supports shall have vertical members constructed of unistrut or Schedule 40 pipe and shall be sturdy enough to withstand substantial overloading, such as would be encountered if a worker stepped on the supported piping. Square steel plates shall be bolted or welded to the base of all vertical supports and shall be secured to the floor with no less than two anchors. Base plates shall be large enough to withstand lateral forces from any direction. Angle brackets are not suitable for this purpose.

2.6

ATTACHMENTS

A.

Supports, anchors and guides shall be attached to structural framing members, concrete slabs or masonry walls. Where supports are required between structural framing members, suitable intermediate framing shall be provided.

B.

Hanger rods shall be the same diameter as the hanger tapping. Use Grinnell Fig. 146 rod, or as approved. All hanger rods shall be galvanized. No rod shall be smaller than 3/8" diameter.

C.

Steel beam and joist attachments - Grinnell Fig. 229 beam clamp or Fig. 87 C-clamp with retaining strap.

D.

Concrete inserts: Zinc-coated B-Line Series B-52 in length as required. Grinnell Fig. CB for single hangers, or as called out on details on plans.

E.

Use expansion shield bolts for fastening to concrete.

2.7

BASES

A.

Concrete bases for vibration control or housekeeping shall be provided for items so noted or wherever indicated on the drawings.

B.

Bases shall be provided as a part of this DIVISION of the specifications but shall be done in accordance with the requirements of DIVISION 3 - CONCRETE.

C.

See structural drawings for reinforcing details.

PART 3 EXECUTION

3.1

ANCHORS

A.

Anchor braces shall be installed where indicated or required and in the most effective manner to obtain the desired restraint.

B.

Supports, anchors, or stays shall be attached in places where such supports will not injure the construction during installation or damage the structure by the weight or expansion of the pipeline.

C.

Anchor, block and brace pipe to prevent movement and rattle from water surges and hammer.

3.2

HANGERS

A.

Chain, wire strap, or other makeshift devices will not be permitted as hangers or supports.

B.

Provide hangers for all pipe. Support risers and brace pipe for stability.

C.

Beam clamps shall be provided with retainers to prevent them from slipping off the beam.

D.

Provide appropriate type of concrete inserts, or expansion shield bolts as noted on the drawings or as required for fastening to concrete structures.

E.

Spacing of Hangers and Supports

1.

A hanger or support shall be installed not over one foot from each change in direction of piping.

2.

Hangers and supports for straight runs of piping shall not exceed the spacing listed below.

Maximum

Type of Pipe Size

Spacing

Steel Up thru 1‑1/4"

7'-6"

1‑1/2" thru 3-1/2"

10'-0"

4" thru 5"

15'-0"

6" and Up

20'-0"

DWV Copper

1-1/4" thru 1-1/2"

5'-0"

2" thru 2-1/2"

7'-6"

3" thru 4"

10'-0"

Type L or M Copper

Up thru 1"

5'-0"

1-1/4" thru 1-1/2"

7'-6"

2" and Up

10'-0"

Cast Iron Soil Pipe All

1 per length (adj. to joint)

(adj. To joint)

Plastic

All

As recommended by Mfg.

Hubless Cast Iron

All

As per code

3.

In addition to the above maximum spacing, additional hangers shall be used at, heavy valves, multiple soil pipe fittings, etc., as necessary to prevent sagging and strain on equipment and fittings.

4.

Piping shall be supported independently from pumps and other in-line equipment so that equipment can be removed without the need for pipes to have temporary support.

5.

Hangers shall be laterally spaced at a distance from each other and from other obstacles sufficient to install pipe insulation without shaving insulation.

6.

Grooved pipe systems shall be supported as recommended by the system manufacturer.

3.3

HANGER ADJUSTMENT

A.

All hangers shall be adjusted to equally support pipe systems and equipment. Adjustment to be made after the systems are filled and operating.

3.4

PROTECTION SADDLES

A.

A protection saddle shall be installed at each pipe hanger.

B.

Wood blocking shall not be used to support insulated pipe. See SECTION 15250 for required rigid support insulation materials.

3.5

SPRING HANGERS

A.

Spring hangers shall be installed where shown on the plans and/or installed as the two first hangers on pipe runouts over 1" in size which connect to rotating equipment which is supported on vibration isolators.

3.6

PAINTING

A.

Unless otherwise indicated, equipment supports which are custom fabricated or are supplied bare or with only a factory primer coat shall be painted as described in DIVISION 9 or as listed below. Pipe hangers and supports located in occupied spaces shall also be painted as described below. Galvanized supports and hangers do not require painting, except in finished spaces.

B.

Apply two coats full gloss enamel over primer. Primer is not required on items which are factory primed. Total film thickness not to be less than 2.5 mils. Color in concealed or unfinished spaces to be black or to match equipment or adjacent surface. Color in finished spaces to be as selected by the Architect.

C.

Acceptable coatings are as follows:

1.

Primer shall be alkyd base zinc chromate formula as listed or approved equal.

a.

Pittsburg Paints 6-204 Zinc Chromate Primer.

b.

Pratt and Lambert Tech-Gard Zinc Chromate Primer E154.

c.

Sherwin Williams Zinc Chromate Primer B50Y1.

2.

First and second finish coats to be high gloss alkyd enamel as listed or approved equal.

a.

Pittsburg Paints 6-252 Speedhide Alkyd Enamel.

b.

Pratt and Lambert Effecto Enamel.

c.

Sherwin Williams S-W Metalistic II Enamel.

END OF SECTION 15090

PACKAGE M OUTBUILDING RENOVATION NIH-NIAID RML HAMILTON, MT

SUPPORTS, ANCHORS AND BASES 15090-2

RML AUTOCLAVE REPLACEMENT • NIH-NIAID RML • HAMILTON, MT

SUPPORTS, ANCHORS AND BASES 15090-5