In this 2018 IRC paragraph below, would an attic space be the “concealed combustible space”?
R908.4 Roof recovering. Where the application of a new roof covering over wood shingle or shake roofs creates a combustible concealed space, the entire existing surface shall be covered with gypsum...
In reference to open-web steel joists that frame a roof, I am searching for test data that provides information on the strength of welds following a fire event. Additionally, any other information, current or past, regarding strength of welds and/or of structural steel (joists and/or other...
Engineers . . .
I have a load-bearing concrete-block industrial building built in 1935 that I have examined. The roof is framed with open-web steel bar joists; 50 foot span, 5-foot on-center spacings. A fire occurred in a machine inside the building. The direct-destructive fire damage is...
Engineers . . .
I have a load-bearing concrete-block industrial building built in 1935 that I have examined. The roof is framed with open-web steel bar joists; 50 foot span, 5-foot on-center spacings. A fire occurred in a machine inside the building. The direct-destructive fire damage is...
Masonry Designers:
Regarding cast-stone units over wood framing, what does 2003 IRC mean in section R703.7, page 207 when it stipulates "an additional 8 feet permitted for ends" considering the allowable height of masonry veneer being 30 feet for buildings in Seismic Design Categories A and B...
Wood Engineers,
I need to know the design values for wood, specifically, SYP, for components that are nominally 1x. Design value tables specify 2x as being the smallest dimensional lumber having tabulated and published values, as I have seen anyway. A link to information that could assist me...
Waste Water Engineers,
I am investigating a sewage flooding event in small-town Indiana. This system was reportedly built in the 60's. Is, or was there, a design criteria for rainfall, such as a 10-year/one-hour rain storm event that would have been, or is, in force then or now to determine if...
Poured-Concrete Engineers:
Looking at an 8-foot high, 10-inch thick basement retaining wall that has sustained a horizontal crack for approximately 60 feet of its 123 foot length. Is it practical & feasible to remove the slab inside the wall, pour a footing, & pour a new wall to reinforce the...
Wood Truss Engineers,
Normally, is there an additional dead load for non-bearing interior stud walls put in design loads for an apartment-use floor structure using metal-plated flat wood trusses from framing? I have a 40 (TC - LIVE), 15 (BC - DEAD), 5 (BC - DEAD) load compilation listed on a...
I have calculated the moment of inertia of a 2x4, 18-inch deep modified metal-plated flat truss as 1312.79 from standard "equal rectangle" formula in the AISC manual. Can someone tell me where to obtain wood floor truss section properties listed? I believe this looks correct. I am not into wood...
ENGINEERS:
I am attempting to determine the air temperature of the interior of a plumbing/pipe chase that is enclosed by an ABS shower stall (55 F inside the stall in the living space), and by a wood stud-frame wall with only friction-fit 3-1/2 inch fiberglass batt insulation (no interior or...
Engineers:
If the inside surface temperatures of wall construction of an interior wall and an exterior wall can be determined from resistances of the materials and interior/exterior temperature differentials, can the temperature of the air in the space in a pipe chase (between the walls) in an...
Has anyone seen rigid polyisocyanurate board installed between the top chord of a steel bar joist & the underside of roof deck? Is this done with any frequency?
Does anyone know of a known-successful method & procedure to add section to the bottom chord of a wood, metal-plated flat floor truss to decrease the deflection ?
Does anyone know of an online program that provides building elevations relative to sea level and/or building heights to local grade - preferably at no cost, and if possible, including the capability to locate heights of roof areas at different locations ?
I need to analyze the capacity of an existing 60-foot, three-leg, tube-steel communications tower for moment and tension at the base. The 1-1/4-inch diameter legs are 16-1/2 inches on-center and of 50K steel tubing. What are the factors for allowable stress design with regard to tension &...
In general, did the implementation of 90 mph wind speeds, as opposed to the former 70 mph speeds in the code, affect an increase in the amount of reinforcing required in load-bearing 8-inch concrete-block walls that support roof loads with steel bar joists? The structure I am concerned with is...
Does anyone know of a i-net site that has good examples of wind analysis for different types of buildings (gable-framed wood structures particularly) using ASCE 7-95?
A clear, concise book with examples would also be helpful.
Thanks!
I need some formulas for figuring radius' of gyration for a square precast concrete column & a double-tee wall panel. I have an example problem in a book that indicates r=7.2" for a 24" square column???? It also shows that r=7.23" for a prestressed 8'x24" deep double-tee wall panel.
Thanks,
I have a nominal 6x6 sawn-wood column with a 14' unbraced length. The column supports an eccentric load from 16' span & 8' beam spans (supporting roof trusses) on opposing sides of the column. The bottom of the column has been cast in concrete - literally; as an interior column for a pole barn...
