The following is an Addendum to the Bid Specifications, and is a binding part of the contracting agreement. Please review carefully.
General: Where the Bid Specification requires submittals to, or coordination with, the Engineer, Architect, or Owner, these shall be made to/with the Clerk of the Works as named on the front of the Bid Specification.
Changes to specific sections:
Section 00300, under the section "Base Bid" the following section shall be added:
Unit Prices: For work in excess of the specific quantities enumerated in Section 01010-3 Part 3.1C, the following Unit Prices shall be used to calculate additional payments, as per that Section:
Decking replacement: ___________ $/sq ft
Roofing replacement: ___________ $/sq ft
Ledger beam replacement: ___________ $/sq ft
Section 01010-4 Item 6-6: Change the area of warehouse roof decking to be repaired from 64sf to 128sf. This makes it consistent with SKS-3, which specifies 128sf.
Section 01010-4 Item 6-10: Replace "Beam must be supported from the sides and jacked to level or a slight crown prior to gluing." with "Beam must be supported from the sides and jacked to level or a slight crown for at least 2 days prior to gluing to allow inspection of the levelled beam by the clerk of the works before the gluing operation is attempted." This is in addition to the attendence of the clerk of the works at the time of the gluing.
Section 01010-5 Item 7-6: The forge cupola roofing material shall be EPDM rubber, not asphalt.
Section 06100-2 Part 2.02B: Replace "Boards shall be of similar width, length and joint and species type to the existing boards." with "Boards shall be of a similar assortment of widths and lengths as the existing boards, such that the new decking is matched as closely as possible in appearance as the existing decking. This will require a range of widths, from 6" to 12", and an irregular pattern of use of each widths. No adjacent boards shall have the same width." Note that the species is specified earlier in this part as southern yellow pine.
Section 07300-2 Part 1.06B: Replace entire clause to read: "Contractor shall warrant the warehouse, stable and forge cupola roofs from leaking for a period of five (5) years on a non-prorated basis, including both labor and materials. "
Answers to Questions asked during the site walk-through:
Q1: Please forward Prevailing Wages/Davis-Bacon rates if required.
A: These are required, and will be attached on the website by Wednesday 4/8/09.
Q2: Should the replacement floor decking have a splined edge joint or is a tongue and groove joint acceptable (as shown on engineer's drawings)?
A: Tongue and groove is acceptable. Edges adjacent to the existing boards must be joined with a spline or tongue.
Q3: What should be the presumed thickness of the roof decking? Should the roof decking have a splined edge joint?
A: The roof decking can have a tongue and groove joint, and should match the thickness of the existing roof decking. Since there is no decking currently exposed it is not possible to measure this reliably now, but a loose (and rotten) piece of decking looks like it is about 2-1/4". It is the responsibility of the bidder to determine the correct thickness to match the current roof and floor decking.
Q4: The existing roof sheathing on the cupola would likely not survive removal of the existing roofing. Should replacement of sheathing be included in base bid? Will the new roofing be installed over the existing? include ice/water shield under shingles? are new flashings required?
A5: The addenda shows a change to EPDM rubber membrane roofing for the cupola. Replacement of sheathing should be included. New flashings are not required as the existing flashing can be reused.
Q6: Replacement of stove pipe is to begin at roof deck or below?
A: The stovepipe extends a short distance, less than 12 inches, below roof deck and so the entire stovepipe should be replaced and re-sealed at the roof as needed.
Q7: Specification items in section 07500, 1.02, A, B, and C are not noted on the drawings. Where are these repairs to be done (copper repairs, new copper components, downspout repairs, lead reglets, flashing and counter flashing)?
A: These items are not required. (They are vestiges of an earlier use of this spec that weren't removed, sorry.) There is no copper work, other than sealing of the coping on the warehouse, but there is nothing specific to copper about that work.
Q8: None of the manufacturers listed in section 07300 provide warranties for portions of a roof, only for a complete roof system. Performance of the work described in the specifications will replace roofing that is above the damaged areas, but will not necessarily address the roof's problems (e.g. none of the roofs are properly pitched to the roof drains). The water may be penetrating the roof anywhere.
A: We have shortened the warranty to 5 years from 14 in the addendum. Since one of the major objectives of this stabilization project is to make these buildings watertight, we need the roofer to assure that all possible sources of water infiltration have been identified and stopped, and then to guarantee this against leaks for a period of 5 years.
Q9: Item 7-4 in the Description of Work states "re-caulk parapet coping at warehouse". What sealant material is to be used at these joints? Which joints are to be sealed: soldered joints, locked joint at coping, or only the termination bar joint?
A: The sealant should be GE Silicone II, unless a better alternative is approved in advance. Both the termination bar and the coping joints must be re-sealed.
Q10: Is the Fire Alarm system a supervised system? Will there be any fees for the shut-down/re-installation of fire alarm devices mounted on structural members that are to be replaced/supported?
A: The fire-alarm system is a supervised system, and will require shut-down and re-starting several times so that it is active through the project. All appropriate fire and electrical codes must be complied with. An licensed electrician will be needed to perform minor adjustments to the conduit to allow a drop for the thickness of the LVL installed under the roof rafter in the carpenter's shop. These costs should be included in the bid.