The International Mechanical Code Para 602.2.1 states: Materials within plenums. Except as required by Sections 602.2.1.1 through 602.2.1.6, materials within plenums shall be noncombustible or shall have a flame spread index of not more than 25 and a smoke-developed index of not more than 50...
I am having a problem on one drawing where after I set the scale in paperspace, when I switch to model space to adjust the center of the viewport, I can't pan in the viewport because the viewport zooms to the extents of the drawing. Is there some switch that I don't know abour?
I have a spec requiring a geotextile with a permeability of 0.1 cm/sec using ASTM D4491. I am looking at using a 0.491 cm thick geotextile with a permittivity of 0.7 sec(^-1). Calculating the hydraulic conductivity as (permittivity)*(thickness), I get k=0.293cm/sec. The data sheet lists the...
Is anyone aware of any documented steel beam failures in residential basements due to unreinforced point loads?
I ask this question, because my own observations (and also responses from several steel suppliers) indicate that residential steel basement beams are typically not reinforced at...
I am designing a 30 ft long (3) span continuous steel beam for a residential basement. The floor joist system provides continuous support for the top flange. The beam is bolted to the top bearing plates of (2) adjustable steel columns spaced approximately 10’ apart. The column reaction...
According to the 20006 IRC Commentary, The Minimum Widths of Concrete Footings in Table R403.1 is "calculated based on 20 feet (6096 mm) of tributary roof area,16 feet (4877 mm) of tributary floor areas, 10-foot-high (3048 mm) first story walls, and 8-foot-high (2438 mm)second and third story...
Should the Size Factor C_F for a built-up header of (3) 2x10s be 1.1 or 1.2 when using the 2005NDS Supplement Table 4A Adjustment? The notes do not specify if the factor applies to the component 2x10s or the built-up assembly. It seems that using the larger factor of 1.2 might be double dipping...
