B09_Amendment_03_Answers_to_Questions_0003.pdf
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- Solicitation number
- 140P2026R0101
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This is a Questions and Answers document for GRCA 257282, Replace South Rim Wastewater Treatment Plant, Amendment 03, dated 09.02.2026, Contract No. 140P2026R0101.
The document contains four clarification questions and responses addressing structural and coating specifications for the wastewater treatment plant project. Question 1 seeks clarification on column dimensions (W12x45) located 10 feet north of Line 1 on the Process Tanks Structural Lower Level Plan, with the response referencing a callout on drawing 25S1020 attached to Addendum 3. Question 2 addresses constructability concerns regarding moment connections to column webs (detail 0512-020) that present installation conflicts due to 3/8" stiffeners; the response directs bidders to new connection details and callouts on drawings 25S1040 and 25S5001 in Addendum 3. Question 3 inquires about armor angle specifications and headed stud sizing and spacing, with the response directing reference to drawing 87S1030 for SST L3x3x¼ angle specifications. Question 4 addresses painting and coating system assumptions for structural steel, confirming that steel roof trusses and monorails receive System No. 4 Exposed Metal – Highly Corrosive shop primer, while all other structural steel receives a different system specification. The document serves as official clarification for contract bidders regarding technical specifications and design modifications.
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140P2026R0101 / Amendment 03/
09.02.2026
GRCA 257282, Replace South Rim Wastewater Treatment Plant
Question No. Sheet or Reference Question Response
Ref. 25S1020 Process Tanks Structural Lower Level Plan; What size are the (2) columns 10’- 0’ North of Line 1?
The columns are W12x45. Callout provided by markupon drawing 25S1020 (attached to Addendum 3).
Ref. 1/25S5001 Moment Connection; The perpendicular beam connections to the column web are called out as 0512-020. These beams are not erectable due to the presence of the 3/8” stiffeners above and below the beam connection. Please advise.
New connection detail and callouts provided for the beam to column web connection. Markups provided on drawings 25S1040 and 25S5001 (attached to Addendum 3).
Ref. 1/87S1030 “Armor Angles”; What size are the angles? Size and spacing of the headed studs?
Use SST L3x3x¼. Markup provided for drawing 87S1030 (attached to Addendum 3).
Ref. 09 90 00 Painting and Coatings; We assume all structural steel is to be shop primed with System No. 5 Exposed Metal – Mildly Corrosive other than the steel roof trusses which are to be shop primed with System No. 4 Exposed Metal – Highly Corrosive. Please confirm.
Steel roof trusses and monorails shall be shop primed with System No. 4 Exposed Metal – Highly Corrosive.
All other structural steel shall be shop primed with
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