BID 2023-51 Clarifying Questions -1.pdf

Bid 2023-51 Clarifying Questions -1 Page 1

INVITATION TO BID #2023-51

Tickle Creek (427th Ave) Culvert Replacement Project

RESPONSE TO CLARIFYING QUESTIONS #1

June 14, 2023

Note that these are questions submitted by interested firms to the above referenced solicitation.

The below answers are for clarification purposes only and in no way alter or amend the BID as published.

1. Question #1: Plans call out for owner supplied 10’ diameter CMP culvert. Will there be details provided pre-bid on type of culvert, weights, piece count to assist in the pricing of setting?

Answer #1: Attached are instructions for unloading and handling Corrugated Metal Pipe from the manufacturer, Contech. Below are the pipe specifications for the 120-inch diameter, 12 gauge, corrugated metal pipe material:

• 12 gauge, 120-inch diameter

• Section/piece lengths: 20 feet

• Three sections/pieces – 3,660 lbs per piece (183 lbs/linear feet)

2. Question #2: Plan sht#5 calls out detail 3/9(pointing to excavation area). Details 3/9 is a detail depicting a vertical cut as identified in spec section 00405.41(a), that refers to “not” using an open cut method. Detail 2/9 depicts an open cut method to install the 10’ diameter CMP. Please clarify.

Answer #2: An open cut method is acceptable for construction. However, the contractor can choose a vertical cut (with shoring) method, if preferred. Please note the structure excavation and granular wall backfill estimated quantities listed in Section 00510 reflect an open cut method of construction.

Attachment: Safety Instructions for Unloading and Handling Contech Corrugated Metal Pipe

End of Clarifying Questions #1

ENGINEERED SOLUTIONS

Safety Instructions for Unloading and Handling Contech Corrugated Metal Pipe

Preface

This instruction book is for your crews. Distribute it to help them unload and handle Contech Corrugated Metal Pipe safely.

Don’t assume that experienced workers know all the answers. Review these instructions with your supervisors and crews. It can mean a safer and better job for you and your customer.

Contents Page

Safety instructions for unloading and handling Handling weights Assembly and installation references Heavy construction loads

When you see this symbol, be alert to the possibility of personal injury, and be sure you understand the message that follows.

Terms you should know Alerts you to hazards or unsafe practices that

CAN result in severe personal injury or property damage.

Messages about procedures or actions that must be followed for safe handling of corrugated metal pipe.

Notwithstanding the instructions contained in this booklet, it is the responsibility of the consignee or consignee’s agent to devise safe unloading and handling procedures.

Unloading and Handling

The following equipment is recommended for unloading pipe or pipe bundles:

Other unloading methods such as chains, wire rope, cinching, or hooks in the end of the pipe should not be used.

Do not stand or ride on the load of pipe while it is being unloaded.

General

1. Contech recommends the use of slings for all pipe handling requirements.

2. Hooks, chains or wire rope may damage the pipe.

trailer or permit pipe to drop to the ground.

Falling or rolling pipe can cause severe personal injury or death.

Read and follow all safety instructions before unloading pipe.

Failure to follow these instructions can result in serious injury or death and/or damage to pipe.

1. Only trained and authorized equipment operators are to be permitted to unload

and eye protection.

wear gloves made from cut-resistant materials.

4. Park the truck and trailer on level ground before you start unloading. It is the responsibility of the consignee to direct the driver to level ground for parking the truck.

5. Keep all unauthorized persons clear of the area when the driver releases the binders from the trailer and during unloading.

steel straps. Do not cut the steel strapping around the bundles until the bundles have been placed on level ground, blocked or secured, and will not be moved again as a unit. It is recommended that the steel strapping be cut with appropriate sized cutting tools.

Stand to the side when cutting a strap. Always be aware that pipe may move, roll, or fall when a strap is cut.

by the steel strapping around the bundles.

8. Know the capabilities and rated load capacities of your lifting equipment. Never exceed them.

pipe while it is being unloaded. Do not stand beneath or near the pipe while it is being unloaded.

the Associated General Contractors, shall be used as a guide and observed.

13. The contractor shall comply with all applicable city, state, and federal safety codes in effect in the area where he is performing the work. This conformance shall include the provisions of the current issue of the “OSHA Safety and Health Standards (29 CFR 1926/1910)” as published by the U.S.

Department of Labor.

Handling Weights

Contech Corrugated Steel Pipe

Approximate weight (pounds/lineal foot). These are estimated average weights and are not for specification use.

Table 1.

Handling weights for CSP(1) with 2 2/3” x 1/2” corrugation

Weight (Pounds/Lineal Foot) Weight (Pounds/Lineal Foot) Inside

Diameter (Inches)

Gage Specified Thickness (Inches)

Galvanized

ALUMINZED2

Full Coated Coated &

PAVED-

INVERT

SMOOTH-

FLO

SmoothCor

12 18 0.052 8 10 13 16 0.064 10 12 15 14 0.079 12 14 17

15 18 0.052 10 13 16 26 16 0.064 12 15 18 28 14 0.079 15 18 21 31

18 18 0.052 12 16 19 31 16 0.064 15 19 22 34 25 14 0.079 18 22 25 37 28

21 18 0.052 14 18 23 36 16 0.064 17 21 26 39 29 14 0.079 21 25 30 43 33 12 0.109 29 29 33 47 41

24 18 0.052 15 20 26 41 16 0.064 19 24 30 45 30 14 0.079 24 29 33 47 38 12 0.109 33 38 44 59 47

30 18 0.052 20 26 32 51 16 0.064 24 30 36 55 42 14 0.079 30 36 42 60 48 12 0.109 41 47 53 72 59

36 18 0.052 24 31 39 50 16 0.064 29 36 44 65 51 14 0.079 36 43 51 75 58 12 0.109 49 56 64 90 71 10 0.138 62 69 77 100

(1) Helical lockseam pipe only. Annular riveted pipe weights will be higher.

(2) Weights for TRENCHCOAT® polymer-coated pipe are 1% - 4% higer, varying by gage.

Table 1.

Handling weights for CSP(1) with 2 2/3” x 1/2” corrugation

Weight (Pounds/Lineal Foot) Weight (Pounds/Lineal Foot) Inside

Diameter (Inches)

Gage Specified Thickness (Inches)

Galvanized

ALUMINZED2

Full Coated Coated &

PAVED-

INVERT

SMOOTH-

FLO

SmoothCor

12 18 0.052 8 10 13 16 0.064 10 12 15 14 0.079 12 14 17

15 18 0.052 10 13 16 26 16 0.064 12 15 18 28 14 0.079 15 18 21 31

18 18 0.052 12 16 19 31 16 0.064 15 19 22 34 25 14 0.079 18 22 25 37 28

21 18 0.052 14 18 23 36 16 0.064 17 21 26 39 29 14 0.079 21 25 30 43 33 12 0.109 29 29 33 47 41

24 18 0.052 15 20 26 41 16 0.064 19 24 30 45 30 14 0.079 24 29 33 47 38 12 0.109 33 38 44 59 47

30 18 0.052 20 26 32 51 16 0.064 24 30 36 55 42 14 0.079 30 36 42 60 48 12 0.109 41 47 53 72 59

36 18 0.052 24 31 39 50 16 0.064 29 36 44 65 51 14 0.079 36 43 51 75 58 12 0.109 49 56 64 90 71 10 0.138 62 69 77 100

(2) Weights for TRENCHCOAT® polymer-coated pipe are 1% - 4% higer, varying by gage. Table 1 continued on next page

Table 1 continued . . . (1)

Table 1.

Handling weights for CSP(1) with 2 2/3” x 1/2” corrugation

Weight (Pounds/Lineal Foot) Weight (Pounds/Lineal Foot) Inside

Diameter (Inches)

Gage Specified Thickness (Inches)

Galvanized

ALUMINZED2

Full Coated Coated &

PAVED-

INVERT

SMOOTH-

FLO

SmoothCor

42 18 0.052 28 36 45 71 16 0.064 34 42 51 77 60 14 0.079 42 50 59 85 68 12 0.109 57 65 74 100 82 10 0.138 72 80 89 115 8 0.168 88 96 105 131

48 16 0.064 38 48 57 85 67 14 0.079 48 58 67 95 77 12 0.109 65 75 84 112 94 10 0.138 82 92 101 129 8 0.168 100 110 119 147

54 14 0.079 54 65 76 105 87 12 0.109 73 84 95 124 106 10 0.138 92 103 114 143 8 0.168 112 123 134 163

60 12 0.109 81 92 106 140 117 10 0.138 103 114 128 162 8 0.168 124 135 149 183

66 12 0.109 89 101 117 160 129

10 0.138 113 125 141 180 8 0.168 137 149 165 210

72 10 0.138 123 137 154 210 (2) 8 0.168 149 163 180 236

78 8 0.168 161 177 194 260 (2)

84 8 0.168 173 190 208 270 (2)

Table 1.

Handling weights for CSP(1) with 2 2/3” x 1/2” corrugation

Weight (Pounds/Lineal Foot) Weight (Pounds/Lineal Foot) Inside

Diameter (Inches)

Gage Specified Thickness (Inches)

Galvanized

ALUMINZED2

Full Coated Coated &

PAVED-

INVERT

SMOOTH-

FLO

SmoothCor

42 18 0.052 28 36 45 71 16 0.064 34 42 51 77 60 14 0.079 42 50 59 85 68 12 0.109 57 65 74 100 82 10 0.138 72 80 89 115 8 0.168 88 96 105 131

48 16 0.064 38 48 57 85 67 14 0.079 48 58 67 95 77 12 0.109 65 75 84 112 94 10 0.138 82 92 101 129 8 0.168 100 110 119 147

54 14 0.079 54 65 76 105 87 12 0.109 73 84 95 124 106 10 0.138 92 103 114 143 8 0.168 112 123 134 163

60 12 0.109 81 92 106 140 117 10 0.138 103 114 128 162 8 0.168 124 135 149 183

66 12 0.109 89 101 117 160 129

10 0.138 113 125 141 180 8 0.168 137 149 165 210

72 10 0.138 123 137 154 210 (2) 8 0.168 149 163 180 236

78 8 0.168 161 177 194 260 (2)

84 8 0.168 173 190 208 270 (2)

Table 2 Handling weights for CSP (1) with 3” x 1” or 5”x 1” corrugation

Weight (Pounds/Lineal Foot) Weight (Pounds/Lineal Foot) Inside

Diameter (Inches)

Gage Specified Thickness (Inches)

Galvanized

ALUMINZED2

Full Coated Coated &

PAVED-

INVERT

SMOOTH-

FLO

SmoothCor

48 16 0.064 44 59 75 123 14 0.079 54 69 85 132 12 0.109 74 89 105 152

54 16 0.064 50 66 84 138 84 14 0.079 61 77 95 149 95 12 0.109 83 100 118 171 118 10 0.138 106 123 140 194 8 0.168 129 146 163 217

60 16 0.064 55 73 93 153 93 14 0.079 67 86 105 165 105 12 0.109 92 110 130 190 130 10 0.138 118 136 156 216 8 0.168 143 161 181 241

66 16 0.064 60 80 102 168 102

14 0.079 74 94 116 181 116 12 0.109 101 121 143 208 145 10 0.138 129 149 171 236 8 0.168 157 177 199 264

72 16 0.064 66 88 111 183 112

14 0.079 81 102 126 197 127 12 0.109 110 132 156 227 157 10 0.138 140 162 186 257 8 0.168 171 193 217 288

78 16 0.064 71 95 121 198 120 14 0.079 87 111 137 214 136 12 0.109 119 143 169 246 168 10 0.138 152 176 202 279 8 0.168 185 209 235 312

84 16 0.064 77 102 130 213 130 14 0.079 94 119 147 230 147 12 0.109 128 154 182 264 181 10 0.138 164 189 217 300 8 0.168 199 224 253 335

Handling weights for CSP (1) with 3” x 1” or 5”x 1” corrugation

Weight (Pounds/Lineal Foot) Weight (Pounds/Lineal Foot) Inside

Diameter (Inches)

Gage Specified Thickness (Inches)

Galvanized

ALUMINZED2

Full Coated Coated &

PAVED-

INVERT

SMOOTH-

FLO

SmoothCor

48 16 0.064 44 59 75 123 14 0.079 54 69 85 132 12 0.109 74 89 105 152

54 16 0.064 50 66 84 138 84 14 0.079 61 77 95 149 95 12 0.109 83 100 118 171 118 10 0.138 106 123 140 194 8 0.168 129 146 163 217

60 16 0.064 55 73 93 153 93 14 0.079 67 86 105 165 105 12 0.109 92 110 130 190 130 10 0.138 118 136 156 216 8 0.168 143 161 181 241

66 16 0.064 60 80 102 168 102

14 0.079 74 94 116 181 116 12 0.109 101 121 143 208 145 10 0.138 129 149 171 236 8 0.168 157 177 199 264

72 16 0.064 66 88 111 183 112

14 0.079 81 102 126 197 127 12 0.109 110 132 156 227 157 10 0.138 140 162 186 257 8 0.168 171 193 217 288

78 16 0.064 71 95 121 198 120 14 0.079 87 111 137 214 136 12 0.109 119 143 169 246 168 10 0.138 152 176 202 279 8 0.168 185 209 235 312

84 16 0.064 77 102 130 213 130 14 0.079 94 119 147 230 147 12 0.109 128 154 182 264 181 10 0.138 164 189 217 300 8 0.168 199 224 253 335

(2) Weights for TRENCHCOAT® polymer-coated pipe are 1% - 4% higer, varying by gage. Table 2 continued on next page

Handling weights for CSP (1) with 3” x 1” or 5”x 1” corrugation

Weight (Pounds/Lineal Foot) Weight (Pounds/Lineal Foot) Inside

Diameter (Inches)

Gage Specified Thickness (Inches)

Galvanized

ALUMINZED2

Full Coated Coated &

PAVED-

INVERT

SMOOTH-

FLO

SmoothCor

90 16 0.064 82 109 140 228 139 14 0.079 100 127 158 246 157 12 0.109 137 164 195 283 194 10 0.138 175 202 233 321 8 0.168 213 240 271 359

96 16 0.064 87 116 149 242 148 14 0.079 107 136 169 262 168 12 0.109 147 176 209 302 208 10 0.138 188 217 250 343 8 0.168 228 257 290 383

102 16 0.064 93 124 158 258 158 14 0.079 114 145 179 279 179 12 0.109 155 186 220 320 222 10 0.138 198 229 263 363 8 0.168 241 272 306 406

108 14 0.079 120 153 188 295 189 12 0.109 165 198 233 340 235 10 0.138 211 244 279 386 8 0.168 256 289 324 431

114 14 0.079 127 162 199 312 200 12 0.109 174 209 246 359 248 10 0.138 222 257 294 407 8 0.168 271 306 343 456

120 14 0.079 134 171 210 329 211 12 0.109 183 220 259 378 260 10 0.138 234 271 310 429 8 0.168 284 321 360 479

126 12 0.109 195 233 274 400 276 10 0.138 247 285 326 452 8 0.168 289 338 378 504

132 12 0.109 204 244 287 419 289 10 0.138 259 299 342 474 8 0.168 314 354 397 529

138 12 0.109 213 355 300 438 300 10 0.138 270 312 357 495 8 0.168 328 370 415 553

144 10 0.138 282 336 373 517 (2) 8 0.168 344 388 435 579

(1) Helical lockseam pipe only. Annular riveted pipe weights will be higher.

Table 2 continued . . . (1)

Handling weights for CSP (1) with 3” x 1” or 5”x 1” corrugation

Weight (Pounds/Lineal Foot) Weight (Pounds/Lineal Foot) Inside

Diameter (Inches)

Gage Specified Thickness (Inches)

Galvanized

ALUMINZED2

Full Coated Coated &

PAVED-

INVERT

SMOOTH-

FLO

SmoothCor

90 16 0.064 82 109 140 228 139 14 0.079 100 127 158 246 157 12 0.109 137 164 195 283 194 10 0.138 175 202 233 321 8 0.168 213 240 271 359

96 16 0.064 87 116 149 242 148 14 0.079 107 136 169 262 168 12 0.109 147 176 209 302 208 10 0.138 188 217 250 343 8 0.168 228 257 290 383

102 16 0.064 93 124 158 258 158 14 0.079 114 145 179 279 179 12 0.109 155 186 220 320 222 10 0.138 198 229 263 363 8 0.168 241 272 306 406

108 14 0.079 120 153 188 295 189 12 0.109 165 198 233 340 235 10 0.138 211 244 279 386 8 0.168 256 289 324 431

114 14 0.079 127 162 199 312 200 12 0.109 174 209 246 359 248 10 0.138 222 257 294 407 8 0.168 271 306 343 456

120 14 0.079 134 171 210 329 211 12 0.109 183 220 259 378 260 10 0.138 234 271 310 429 8 0.168 284 321 360 479

126 12 0.109 195 233 274 400 276 10 0.138 247 285 326 452 8 0.168 289 338 378 504

132 12 0.109 204 244 287 419 289 10 0.138 259 299 342 474 8 0.168 314 354 397 529

138 12 0.109 213 355 300 438 300 10 0.138 270 312 357 495 8 0.168 328 370 415 553

144 10 0.138 282 336 373 517 (2) 8 0.168 344 388 435 579

Table 3.

Handling Weight for ALUMINIZED STEEL Type 2 or Galvanized Steel ULTRA FLO with ¾" x ¾" x 7½" corrugation

Weight (Pounds/Lineal Foot) Specified Thickness and Gage

Diameter (Inches)

(0.064”)

(0.079”)

(0.109”)

(0.138”)

18 15 18 21 17 21 29 24 19 24 36 30 24 30 42 36 29 36 50 42 33 42 58 48 38 48 66 80 54 45 54 75 90 60 48 60 83 99 66 66 91 109 72 72 99 119 78 78 108 129 84 116 139 90 124 149 96 132 158

102 141 168 108 175 114 196 120 206

Contech ULTRA FLO Pipe

Table 4.

Handling Weight for ALUMINUM ULTRA FLO with ¾" x ¾" x 7½" corrugation

Weight (Pounds/Lineal Foot) Specified Thickness and Gage

Diameter (Inches)

(0.060”)

(0.075”)

(0.105”)

(0.135”)

18 5 6 21 6 8 11 24 7 9 13 30 9 11 15 36 11 13 18 23 42 12 15 21 26 48 17 24 30 54 19 27 34 60 30 37 66 33 41 72 36 45 78 49 84 52

Contech CORLIX Aluminum Pipe

Table 5.

Handling weights for corrugated aluminum pipe(1) with 2 2/3” x 1” corrugation

D ia m e te r O r Sp a n

In ch e

s) Weight (Pounds/Lineal Foot)

Specified Thickness and Gage

(0.048”) (0.060”) (0.075”) (0.105”) (0.135”) (0.164”)

18 16 14 12 10 8

6(2) 1.3 1.3 8(2) 1.7 2.1

10(2) 2.1 2.6 12 3.2 4

15 4 4.9 18 4.8 5.9 21 5.6 6.9 24 6.3 7.9 10.8

27 8.8 12.2 30 9.8 13.5 36 11.8 16.3 20.7 42 19 24.2

48 21.7 27.6 33.5 54 24.4 31.1 37.7 60 34.6 41.9 66 46 72 50.1

Notes:

(2) 1 ½” x ¼” corrugation.

Contech CORLIX Aluminum Pipe

Table 6.

Handling weights for corrugated aluminum pipe(1) with 3” x 1” corrugation

D ia m e te r O r Sp a n

In ch e

s) Weight (Pounds/Lineal Foot)

Specified Thickness and Gage

(0.060”) (0.075”) (0.105”) (0.135”) (0.164”)

16 14 12 10 8

30 9.3 11.5 15.8 20.2 36 11.1 13.7 18.9 24.1 42 12.9 16 22 28 48 14.7 18.2 25.1 32 38.8

54 16.5 20.5 28.2 35.9 43.6 60 22.7 31.3 40 48.3 66 24.9 34.3 43.7 53 72 27.1 37.4 47.6 57.8

78 29.3 40.4 51.5 62.5 84 43.5 55.4 67.2 90 46.6 59.3 71.9 96 49.6 63.2 76.7

102 66.6 80.8 108 71 86.1 114 90.9 120 95.6

Installation precautions

and installation, reference the N.C.S.P.A.

“Installation Manual for Corrugated Steel

safety regulations and guidelines must be observed.

precautions may be necessary. The structure must be protected from unbalanced loads and from any structural loads or hydraulic forces that might bend or distort the unsupported ends of the structure. Flotation of the structure and erosion or wash-out of previously placed soil support must be prevented to ensure that the structure maintains its load carrying capacity.

Height of Cover

Temporary Cover For Construction Loads

Finished Grade

Table 7.

Minimum Height of Cover Requirements for

Construction Loads On Corrugated Metal Pipe.

Diameter/Span

(Inches) Axle Load (Kips)

18-50 50-75 75-110 110-150 Steel

12-42 2.0’ 2.5’ 3.0’ 3.0’ 48-72 3.0’ 3.0’ 3.5’ 4.0’

78-120 3.0’ 3.5’ 4.0’ 4.5’ 126-144 3.5’ 4.0’ 4.5’ 4.5’

Aluminum 12-42 3.0’ 3.5’ 4.0’ 4.0’ 48-72 4.0’ 4.0’ 5.0’ 5.5’

78-120 4.0’ 5.0’ 5.5’ 5.5’

ULTRA FLO - Steel ¾” x ¾” x 7 ½” 15-42 2.0’ 2.5’ 3.0’ 3.0’ 48-72 3.0’ 3.0’ 3.5’ 4.0’

78-108 3.0’ 3.5’ 4.0’ 4.5’

ULTRA FLO - Aluminum ¾” x ¾” x 7 ½” 15-42 3.0’ 3.5’ 4.0’ 4.0’

Construction Loads

For temporary construction vehicle loads, an extra amount of compacted cover may be required over the top of the pipe. The Height-of-Cover shall meet minimum requirements shown in the table below. The use of heavy construction equipment necessitates greater protection for the pipe than finished grade cover minimums for normal highway traffic.

NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A

WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED

ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND

DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES

OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO

WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE

APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED

HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL

IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE

ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS

OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE

INFORMATION.

Contech, HEL-COR, PAVED-INVERT, SMOOTH-FLO, and ULTRA FLO are registered trademarks of Contech Engineered Solutions LLC.

ALUMINIZED STEEL is a trademark of AK Steel Corporation.

©2016 Contech Engineered Solutions LLC

All rights reserved. Printed in USA.

ENGINEERED SOLUTIONS

IG-CMP-6 20M 6/16 MC

For additional safety information, visit www.conteches.com/safety.