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THE DESIGNER SHOULD CAREFULLY INVESTIGATE THE PTI
DOCUMENT TO ENSURE THAT THE DESIGN CONFORMS TO PTI
REQUIREMENTS AND THAT CONFLICTS DO NOT OCCUR BETWEEN
THE REFERENCED DOCUMENT AND THIS SPECIFICATION. IN
THE EVENT DEVIATIONS FROM THE PTI RECOMMENDATIONS
ARE NECESSARY, THE SPECIFICATION MUST BE EDITED TO
CLEARLY IDENTIFY SUCH DEVIATIONS. FOR UNUSUAL
CONDITIONS, THE DESIGNER SHOULD ALSO CONSULT
SPECIALTY CONTRACTORS DURING THE DESIGN PROCESS.
ROCK AND SOIL ANCHORS MAY BE USED FOR TEMPORARY
SUPPORT OR FOR PERMANENT SUPPORT. THIS
SPECIFICATION MUST BE CAREFULLY EDITED TO REFLECT
THE DESIGN PARAMETERS APPLICABLE FOR THE INTENDED
DURABILITY.
FOR PROJECTS REQUIRING SPECIALIZED METHODS OR
EXPERIENCE, PARTICULARLY THOSE WHICH ARE PRIMARILY
FOR INSTALLATION OF SOIL OR ROCK ANCHORS,
CONSIDERATION SHOULD BE GIVEN TO USING A REQUEST FOR
PROPOSAL (RFP) METHOD OF PROCUREMENT INSTEAD OF AN
INVITATION FOR BIDS (IFB) METHOD. USE OF RFP
PERMITS EVALUATION OF OFFERS ON TECHNICAL CRITERIA
IN ADDITION TO PRICE.
THIS GUIDE SPECIFICATION IS WRITTEN FOR NEW
CONSTRUCTION WHERE THE ANCHOR IS INSTALLED AFTER THE
STRUCTURE IS COMPLETED OR FOR INSTALLING ANCHORS IN
EXISTING STRUCTURES. WHERE THE ANCHORS MUST BE
INSTALLED AND/OR STRESSED PRIOR TO COMPLETION OF THE
STRUCTURE ADDITIONAL REQUIREMENTS WILL BE NECESSARY.
WHERE PRE-INSTALLATION IS REQUIRED, MEANS MUST BE
TAKEN TO PROTECT THE ANCHOR COMPONENTS DURING THE
SUBSEQUENT CONSTRUCTION OF THE STRUCTURE. IF THE
ANCHORS ARE TO BE STRESSED PRIOR TO COMPLETION OF
THE STRUCTURE, IT MAY BE NECESSARY TO STRESS THE
ANCHORS AGAINST CASINGS OR OTHER STRUCTURES AND
TRANSFER THE LOAD TO THE STRUCTURE UPON COMPLETION
ON CONSTRUCTION.
WHERE THE DESIGN OF THE STRUCTURE TO BE ANCHORED
REQUIRES THAT THE ANCHORS BE INSTALLED AND STRESSED
PRIOR TO CONSTRUCTION OF THE NEW STRUCTURE (I.E.
WHERE A NEW ANCHORED WALL IS TO BE CONSTRUCTED TO
PROTECT OR SUPPORT AN EXISTING WALL WHICH IS NOT
CAPABLE OF RESISTING STRESSING LOADS), THE ANCHORS
MAY BE STRESSED AGAINST CASINGS OR A WALER OR THRUST
BLOCKS MAY BE USED TO DISTRIBUTE THE LOAD. IN THIS
CASE, THE CASING AND ROCK SOCKET MUST BE DESIGNED TO
PREVENT DEFLECTION OR EXCESSIVE PULLING OF THE
CASING INTO THE ROCK DURING STRESSING. THE DESIGN
OF THE CASING AND ROCK SOCKET MUST BE INCLUDED IN
THE DESIGN COMPUTATIONS. THE CASING MUST BE SEATED
INTO THE ROCK SOCKET AND REMAIN IN PLACE AFTER
GROUTING OF THE ANCHORS.
MONITORING OF STRESSING SHOULD INCLUDE MONITORING OF
SECTION 02490
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