00535.00 464 Section 00535 - Post -Installed Anchor Systems
Description
00535.00Scope - This Work consists of drilling and preparing holes in hardened concrete and
providing and installing anchor bolts or reinforcement using a resin bonded anchor system or a mechanical anchor system as shown.
00535.01Required Submittals - For resin bonded anchor i nstallation horizontally or upwardly
inclined submit personnel qualifications according to 00535.30 at least 21 Calendar Days before starting Work.
Materials
00535.10Materials - Provide sampling, testing, and quality control according to Section 00165
Provide the Engineer with:
• Certification, according to 00165.35, that the anchor system meets all requirements for the Project. • Mill test certificates verifying the strengths of M aterial used in the manufacture of the anchors.
and reinforcing steel meeting the requirements of Section 02510 as shown. High-strength anchor bolts meeting the requirements of ASTM A193, Grade B7 may be substituted in place of these specified in 02560.30(b).
Furnish a polyester, vinyl ester, or epoxy resin bonding system from the QPL that sustains the minimum pullout force shown. Resin used for installation of the anchor system as shown shall be the same lot used for testing according to 00535.45(a)(1). Unless shown otherwise, do not install anchors larger than 1 inch in diameter using a resin- bonded anchor system.
Unless shown otherwise, galvanize all anchors which have any portion of the anchor exposed. Galvanize according to AASHTO M 232 ( ASTM A153) or AASHTO M 298 ( ASTM B695), Class 50. When within 25 aerial miles of the Pacific Ocean, galvanize according to AASHTO M 232 (ASTM A153) only. Anchors that become completely encased in concrete will not require galvanizing.
Provide thread lengths as shown. If thread lengths are not shown and the anchor is not rebar, provide threads on the resin-bonded end of the anchor for at least 80 percent of the embedment depth shown.
sustains the minimum pullout force and is not longer than the embedment depth shown. Anchors used for installation shall be the same lot used for testing according to 00535.45(a)(2). Unless shown otherwise, provide galvanized mechanical anchors according to AASHTO M 232 (ASTM A153). Labor
00535.30Personnel Qualifications - Provide ACI/CRSI adhe sive anchor certified personnel for
installation of resin bonded anchors horizontally or upwardly inclined (including vertically overhead). Contact Oregon Chapter of ACI, (503) 753- 3075, www.oregonaci.org .
00535.45 465 Construction
00535.40Construction - Install t he anchor system according to the Manufacturer's Printed
Installation Instructions (MPII) and to the embedment depths shown.
hole location to avoid conf licts as shown or as directed. Avoid installing anchors in cracked concrete. Patch abandoned holes with a PCC repair material meeting the requirements of
Clean holes with a nonmetallic brush, compressed air, and water. Remove excess water from the hole. The cleaned hole may be damp, but shall be free of concrete dust, foreign matter, and standing water. Protect drilled and cleaned hole from contamination. If the drilled hole becomes contaminated, as determined by the Engineer, re- clean the hole. Do not install anchors until concrete has cured for 21 Calendar Days.
Provide components connected to the installed anchors with the same metal type or provide electrical isolation when metal type of the components is dissimilar or unknown.
use a drill bit diameter 1/8 inch larger than the nominal anchor diameter for AASHTO M 314 anchors and 5/64 inch larger than the out -to-out diameter for rebar. Install horizontally inclined, upwardly inclined, or vertically overhead resin bonded anchors using a piston plug method.
Do not install resin bonded anchors when the concrete temperature is below 50 °F, unless otherwise advised by the resin manufacturer’s recommendations.
For anchors resisting sustained tension loads do not load or torque anchors until 24 hours after the manufacturer’s minimum full cure time.
For resin bonded anchor system with anchor bolts and nuts, after the resin is fully cured, mark the position of the nut with a felt tip pen or similar marker. Rotate the nut of each anchor bolt past snug-tight by no more than 1/6 turn, unless shown otherwise, to avoid unintended damage.
00535.45Testing - Perform demonstration tests and production tests on anchors as specified in the
anchor test summary.
Perform demonstration tests before installing the anchor system and perform production tests during anchor installation W ork at agreed upon locations.
Do not incorporate demonstration test anchors into the Work. Do not begin installing the anchor system until the installation process is approved. Test results with the average load meeting or exceeding the minimum pullout force will be acceptable. If any test anchor has a capacity less than 95 percent of the minimum pullout force, the anchor lot will be rejected.
anchor system and each anchor type and size.
Install three test anchors using the same Materials and methods that will be used for installing the anchor system. One demonstration test includes 3 test anchors.
00535.80 466 (1) Resin Bonded Anchor System - Test the anchors according to ASTM E488 as confined tension tests up to the minimum pullout force shown. When the pullout force and embedment depth are not shown, install the anchors to the embedment depth and test the anchors using the minimum pullout forces in Table 00535-1.
TABLE 00535-1 Minimum Pullout Force Anchor Bolts Rebar Grade 36 Grade 55 Grade 105 Grade 60 Dia.
Depth
Depth
1/2 7,400 9,700 15,300 4.50 3 7,900 3.25 5/8 11,700 16,900 24,300 6.00 4 14,400 5.25 3/4 17,300 22,500 36,000 7.50 5 22,300 6.50 7/8 24,000 31,200 49,900 9.25 6 31,700 7.50 1 31,700 40,900 65,400 11.00 7 43,800 8.75 8 56,700 10.25 *± 1/8 inch
tension tests up to t he minimum pullout force shown.
production tests during installation of the anchor system, after the installation is finished, and for the resin bonded anchor system the resin has cured accor ding to the manufacturer’s recommendations. One production test includes 1 test anchor. Maintain the test load at the required load level for a minimum of 10 seconds. Test anchors shall not have measurable displacement. If the Engineer suspects improper installations, more testing may be required.
tension tests to 50 percent of the minimum pullout force shown.
For bent rebar anchors (#5 or smaller), furnish and test a straight bar at the required location. After the Engineer accepts test results, cold bend the bar to dimensions as shown. For epoxy coated rebar, inspect for damage to coating and repair damaged coated areas according to 00530.45. For threaded rods and larger reinforcing bars, furnish and install a sacrificial straight test anchor at a minimum distance of 1.5 times embedment depth away from the required location.
tension tests to 40 percent of the minimum pullout force shown.
Measurement
00535.80Measurement - No measurement of quantities will be made for post -installed anchor
systems.
00535.90 467 Payment
00535.90Payment - No separate or additional payment will be made for post -installed anchor
systems. Payment will be included in payment made for the appropriate items under which this Work is required.