The National Academies Press

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From page 58... ... 58 A P P E N D I X B Questionnaire Responses Note that responses have had geographic identifiers removed. Question: Scaling projects are often selected using a variety of methods; some planned and some unplanned. Read the entire page →
From page 59... ... Questionnaire Responses 59 Question: How do scaling contractors generally get selected? Of the following methods, please fill in the general percentage (0 to 100 scale) Read the entire page →
From page 60... ... 60 Estimating and Contracting Rock Slope Scaling Adjacent to Highways Question: How does your department estimate the volume of scaling debris for removal and haul? Read the entire page →
From page 61... ... Questionnaire Responses 61 Question: In your department's experience, what is considered a "reasonable" production rate for "General Scaling"? For consistency between geologic materials and project purposes, presume a nonpresplit rock slope, an RQD of 60%, and as part of a larger rockfall mitigation project within a twolane, rural, mountainous highway corridor with scaling performed using rope access methods. Read the entire page →
From page 62... ... 62 Estimating and Contracting Rock Slope Scaling Adjacent to Highways Question: Which units does your department most frequently use to measure scaling quantities? If multiple methods are used, select which one has had the most success. Read the entire page →
From page 63... ... Questionnaire Responses 63 Question: Does your department use separate bid items for different scaling techniques (hand scaling from ropes, hand scaling from lifts, mechanical scaling, air-pillows, heavy scaling, etc.) Read the entire page →
From page 64... ... 64 Estimating and Contracting Rock Slope Scaling Adjacent to Highways Question: What is your department's preferred method for delineating scaling extents in the plan drawings? Read the entire page →
From page 65... ... Questionnaire Responses 65 Question: Does your department specify performance criteria that defines satisfactory scaling or to otherwise judge when scaling is complete? Read the entire page →
From page 66... ... 66 Estimating and Contracting Rock Slope Scaling Adjacent to Highways Question: If your department requires qualifications for scaling, whom do they apply to? Read the entire page →
From page 67... ... Questionnaire Responses 67 Question: If paying hourly, when does scaling typically "start"? Read the entire page →
From page 68... ... 68 Estimating and Contracting Rock Slope Scaling Adjacent to Highways Question: How does your department measure and pay for removal of scaling debris? Read the entire page →
From page 69... ... Questionnaire Responses 69 Question: How does your department handle "safety scaling" requested by the Contractor not specified in the Plans? For purposes of this survey only, "safety scaling" is scaling requested by the scaling contractor that falls outside the scaling boundaries required in the plan and specifications package. Read the entire page →
From page 70... ... 70 Estimating and Contracting Rock Slope Scaling Adjacent to Highways Question: If your department requires temporary roadway/property protection (e.g., pavement, appurtenant structure, river, or property protection rather than safety-related protection) during scaling, is it: ANSWER CHOICES NUMBER OF RESPONSES RESPONSES (PERCENT) Read the entire page →
From page 71... ... Questionnaire Responses 71 Question: If your department uses temporary rockfall protection measures to facilitate traffic passage, please indicate the success of each measure as part of a temporary rockfall protection system. ANSWER CHOICES NOT USED IN OUR DEPARTMENT FAILED WHEN USED ON A STANDALONE BASIS MINOR CONTRIBUTOR TO SYSTEM SUCCESS MAJOR CONTRIBUTOR TO SYSTEM SUCCESS TOTAL RESPONDENTS Freshly cleaned catchment ditch 20.00% ( total) Read the entire page →
From page 72... ... 72 Estimating and Contracting Rock Slope Scaling Adjacent to Highways Question: How does your department inspect and review scaling activities (multiple choice) Read the entire page →
From page 73... ... Questionnaire Responses 73 Question: Does your department currently or plan to use advanced techniques to measure scaling completion for payment purposes (multiple choice) Read the entire page →
From page 74... ... 74 Estimating and Contracting Rock Slope Scaling Adjacent to Highways Question: Does your department keep records of rockfall activity following scaling? Read the entire page →
From page 75... ... Questionnaire Responses 75 Question: If your department uses advanced techniques to monitor slope performance following scaling completion, which technique? Read the entire page →
From page 76... ... 76 Estimating and Contracting Rock Slope Scaling Adjacent to Highways Question: If applicable, what lesson has your department learned regarding slope scaling over the past 10 to 20 years? Comments: The more time and experience you spend prior to scaling to access the degree of effort for scaling needed the better the project outcome will be. Read the entire page →
From page 77... ... Questionnaire Responses 77 We have run into problems with running out of scaling hours on projects before, specifically for two reasons: (1) Extensive vegetation has obscured some areas of the rock cut, making it difficult to predict actual rock slope conditions, leading to change in design once the vegetation is cleared. Read the entire page →

From page 58...

... 58 A P P E N D I X B Questionnaire Responses Note that responses have had geographic identifiers removed. Question: Scaling projects are often selected using a variety of methods; some planned and some unplanned.