21 20 19 COMMON AERS PEROOT RN 2 211 210 1 1516 the following questions. D. Answ

Question

21 20 19 COMMON AERS PEROOT RN 2 211 210 1 1516 the following questions. D. Answer 1. Who should design roof trusses? a. architect b. carpenter c. engineer d. any of the above 2. Which drawing will include information about the slope of a roof? a. building elevation b. truss delivery sheet c. truss detail drawing d. all of the above 3. What is a piggyback truss? a. a truss that is designed to be used as the top half of a large truss b. a truss design that uses extra web members c. a truss that is to be placed against the side of another truss d. a particular brand of roof truss 4. Which sheet would be the easiest one on which to find the required number of trusses of a particular type? a. floor plan b. truss delivery sheet c. truss detail sheet d. building elevation 5. What is the most reliable place to find the spacing between trusses? a. truss layout b. floor plan c. truss detail sheet d. truss delivery sheet

Explanation / Answer

1. c. Engineer

Civil engineer is responsible for the analysis and design of roof trusses. Architects are only responsible for preparing working drawings of the roof trusses showing the dimensions, plan and elevation of trusses. Carpenters only construct various parts of structure according to the plan and drawings.

2. d. All of the above

Building elevation gives the view of the roof truss along its height, hence the slope of the roof truss is clearly visible and mentioned and it can also be calculated from the dimensions of various members of roof truss.

Truss delivery sheet also contains information about the various dimensions, members, span and slope of roof truss.

Truss detail draing shows the details of the structure, i.e., slope, span, depth, spacing between members, etc.

Therefore, the information about slope of roof is mentioned in all the above 3 options.

3. a. A truss that is designed to be used as the top half of a large truss

Piggyback trusses are generally used when the roof trusses are too tall to be manufactured and it is not feasible to design or manufacture roof trusses. In such cases, piggyback trusses are designed as top half of a large truss.

4. b. Truss delivery sheet

From truss delivery sheet, we can easily determine the required number of trusses of a particular type.

5. c. Truss detail sheet

Truss detail sheet clearly mentions the spacing between various trusses. Truss detail sheet gives in detail various information about trusses, i.e., span, length, depth, spacing, slope of trusses, etc. Hence the information regarding spacing between various trusses can be easily obtained using truss detail sheet.

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