HomeMy WebLinkAboutB17-0255_M1 Mechanical_1502231940.pdfGeneral
1. Immediately notify the Engineer of any discrepancies.
2. It shall be assumed that all subcontractors are experienced and thoroughly knowledgeable in
their respective areas of the construction industry and shall perform in a responsible manner
in an appropriate construction sequence.
3. Do not scale drawings. Verify dimensions in field prior to commencement of work.
4. It is the intent of these drawings and specifications to establish a standard of quality. The
Engineer reserves the right to take exceptions to approve methods and materials not
reflected herein.
5. Failure to order, or release order, for materials and/or equipment will not be accepted as a
reason to substitute alternate materials, equipment, or installation methods.
6. Work shall be performed in a workmanlike manner to the satisfaction of the Architect & the
Engineer.
7. Labor, materials, and equipment shall conform to the latest applicable editions of local,
State of Colorado, and National Codes and ordinances. If conflict between those
publications exists, the most stringent requirement shall apply.
8. Provide record drawings to architect. Drawings shall include all addendum items, change
orders, alterations, re-routings, etc.
9. The drawings show the intent of the mechanical systems but do not show all details
required. It is the responsibility of the Contractors to install complete & operable systems,
which conform to the manufacturers' installations instructions & industry standards.
10. Systems shall be tested for proper operation. If tests show work is defective, Contractor
shall make corrections necessary at no cost to Owner.
11. It is the Contractors' and manufacturers' responsibility to assure themselves that the code
authorities will approve any product to be installed on the project.
12. Coordinate architectural, structural, electrical, landscaping, fire protection, and interior
design drawings with mechanical drawings prior to installation.
13. Verify exact locations of existing and new underground utilities, piping, and raceway
systems prior to trenching. Contractor shall obtain and verify exact utility company
drawings and requirements.
Remodel, Demolition & Unforeseen Conditions
14. Visit site prior to bid and verify the conditions. Include in the bid, costs required to make
work meet existing conditions, whether indicated or not.
15. Provide mechanical demolition required. Refer to architectural demolition drawings for
location and extent of demolition required. Visit site prior to bid to determine extent of
work involved. Provide labor and materials as required to maintain and/or restore
continuity of service to existing systems.
16. In as much as design for remodel, renovation and/or rehabilitation requires that certain
assumptions be made regarding existing conditions and because some of these assumptions
cannot be verified without destroying otherwise adequate or serviceable portions of the
building, the Engineer cannot assure the Owner or the Contractor that the professional
consulting services herein encompass all contingencies. Field coordination during
construction is imperative. Contractors bidding this work must make reasonable allowances
for unseen conditions and should include associated allowances in their bids noted as such.
17. Field verify locations of all existing piping, equipment, ductwork, etc.
18. All new ductwork, piping, equipment, etc. is shown with dark lineweight. All existing
ductwork, piping, equipment, etc. is shown with light lineweight.
19. New hot and cold water branches to be routed from nearest hot water and cold water of line
size equal to or greater than new branch - typical.
Insulation
20. Piping Insulation Schedule:
Service Thickness (in.)
HWS/R (less than 1.5” pipe) 1.5
HWS/R (1.5” pipe and greater) 2.0
Domestic Hot Water 1.0
Domestic Cold Water 0.5
Domestic Hot Water Recirculation 1.0
Piping and fitting insulation shall be U.L. approved Armaflex closed cell pipe insulation.
Buried Piping - Closed cell foam insulation, AP Armacell Armaflex or approved equal.
Surround with 4” of clean sand.
21. Insulation for all types of piping shall be carried full size through pipe hangers or pipes shall
be supported with vibration clamps.
Piping
22. Domestic Hot, Cold & Recirculation piping inside building - Buried lines type 'K' copper
water tube, wrought copper fittings and 1100F solder. Non-buried lines, type 'L' copper
water tube, wrought copper fittings and no lead solder. Provide alternate pricing for PEX
tubing (no oxygen diffusion barrier necessary). Unless otherwise noted, piping on plans has
been sized for copper, and if ASTM PEX piping is used, increase size of piping one
nominal size from size shown on plans, ie. Plans call for a ¾” line & PEX is to be
substituted, a 1” PEX line shall be installed.
23. Waste & Vent piping inside building:
Waste lines above ground - Standard weight, C.I. soil pipe, and fittings, or hubless, C.I. soil
pipe and fittings. Up through 2-1/2" may be standard weight, galvanized steel pipe with
black, C.I. drainage fittings.
Waste lines below grade and all Vent lines for residential may be Schedule 40 ABS-DWV
plastic pipe and fittings (ASTM D2661) or Schedule 40 PVC-DWV plastic pipe and fittings
(ASTM D2665). All pipe and fittings shall bear NFS-DWV mark and shall be joined with
solvent weld joints as recommended by the manufacturer.
24. Heating Water piping - Piping may be type 'K' copper for all buried lines using wrought
copper fittings and 1100F solder. For non-buried piping, type 'L' copper, wrought copper
fittings, and no lead solder. All buried pipe shall be surrounded with 4" of clean sand.
Provide alternate price for PEX tubing (with oxygen diffusion barrier). Unless otherwise
noted, piping on plans has been sized for copper, and if PEX piping is used, increase size of
piping one nominal size from size shown on plans. ie. Plans call for ¾” piping & PEX is to
be substituted, a 1” PEX line shall be installed.
25. Gas Piping - Schedule 40 black steel pipe, 150 lb. malleable iron screwed fittings on above
ground pipe, welded fittings with all piping coated and wrapped on buried pipe. CSST pipe
is permitted for final connections only.
26. Gas Valves - Lubricated plug valve 175 lb. W.O.G. iron screwed or flanged.
27. Copper pipe Valves and Specialties:
Gate Valves: Bronze, Class 125, 200 lb. W.O.G.
Ball Valves: Bronze, Class 125, 200 lb. W.O.G.
Check Valves: Bronze, Class 125, 200 lb. W.O.G.
Balancing Valves: 125 psig w.p. for 250F service tight shut-off, Illinois dual-purpose,
balancing/shut-off valve, Hoffman, Sarco, or equivalent.
28. Refer to Fixture Connection Schedule for pipe sizes to individual fixtures.
29. Support pipe with rod and clevis or clamps. No pipe tape allowed.
30. Provide plastic grommets on all heating water piping passing through wood joists and studs.
31. Install plumbing clean-outs as required by applicable codes.
Ductwork
32. Duct sizes shown on drawings are outside (sheet metal) duct dimensions.
33. All ductwork shall be sealed airtight with duct mastic. Duct tape shall be UL 181 listed.
34. Sheet metal and fittings to be pursuant to SMACNA and ASHRAE standards.
35. All ducts shall be 26 gauge minimum. Duct gauge and construction shall conform to
SMACNA HVAC Duct Construction Standards.
Controls
36. Mount all thermostats 5'-0" above finished floor.
37. Thermostats shall not be installed above heat emitting equipment, including wall mounted
touch screen controls.
Mechanical Specifications
7/20/17
08/08/17