This index can be used to estimate other rock strength parameters.
Point load on roof.
For example in a garage cars trucks boats and rvs constitute live loads.
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Any objects moved in and out the structure are live loads including people designated as occupancy plants furniture and so forth.
The influence of hurricanes or earthquakes can shift the designed loading of a structure.
The dead load of a typical asphalt shingled wood framed roof is about 15 pounds per square foot.
A good example of a point load that is not anticipated is the sliding of a roof load of snow off the pitched roof onto a flat roof.
The focus of this paper is to present the data analysis used to correlate the point load test index is50 with.
Primary roof members exposed to a work floor single panel point of lower chord of roof trusses or any point along primary structural members supporting roofs over manufacturing storage warehouses and repair garages all other occupancies all roof surfaces subject to maintenanceworkers 0 96h 2 87 4 79 i.
910 pounds per lineal foot.
Another simple beam calc for dimensional lumber with drop down species list simple beam point load at midspan simple beam point load at any location two point loads at one third points on a simple beam.
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Point loads such as foot traffic and rolling loads.
The weight of a worker walking across a steel building roof is a live load.
Introduction the point load test plt is an accepted rock mechanics testing procedure used for the calculation of a rock strength index.
This situation would cause a point load created by the pile of snow and if heavy enough could cause failure in the structure.
There are two main forces acting on the board in a roof assembly.
It is important to list live load dead load and total load separately because live load is used to compute stiffness and total load is used to calculate strength.
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The load increases with the use of heavier roofing material.
There are of course other activities on a roof that could contribute to facer delamination such as dropping or dragging objects across the roof assembly.
In traditional sloped roof framing loads are transmitted vertically downward through the roof framing to the exterior walls that transmit the load downward to the home s.
15 psf x 14ft 210 pounds per lineal foot.
