Search results for query: *

So this particular railway bridge was built in 1928. The girder flanges are a pair of 6" x 8" x 3/4" (LLH) then with 3 - 5/8" x 18" cover plates. The top two plates are curtailed E.S. of the center line at the 15' and 20' marks. The bridge span is 56' -3". It' a ballasted, riveted TPG with...

Looking at a RR Bridge from 1929 riveted through plate girder with ballasted concrete/steel diaphragm deck. There's 'pack rust' between the bottom flange plates and in some locations the rust is up to 3/8" thick with the pack rust evident pretty well the full length. Does anybody know if there...

So interested here to know what maximum bed joint thickness would be permitted before compressive strength of the mortar might be affected. TMS 602-13/ACI 530.1-13 3.3.B Placing mortar and units indicates that a 3/8" (9.5mm)thick bed is anticipated/typical. 3.3.F Site tolerances indicates that...

Hi, Have a typical 6 story reinforced concrete block building. Numbers of shear walls spanning across the building width and stair wells at ends and elevator shaft in the middle. I have one line of shear walls that I would like to remove from the SFRS as it stops at the second floor for a...

In Ontario Canada we currently have; 1. A National Building Code, NBC, current date 2015. 2. An Ontario Provincial Building Code, OBC, current date 2012 and having jurisdiction. 3. A national materials standard for the Design of Plain and Reinforced Masonry CSA S304.1-2004 (R2009 and 2014)...

So doing a small, lower end, mass concrete pour, the section is a 1.4m x 1.4m x 50m beam with a standard C1 concrete 35Mpa, 280 kg/m3 type 10 cement with 120 kg/m3 slag. Sealed the exposed top, left the forms on and covered the whole thing with insulated tarps for 3 days. Through the weekend...

Anybody with a general description of Glacial Till? General classification parameters, constituents, testing, properties... Thanks.

So question is thoughts on the requirements, or not, for expansion joints in this wall; Wall is 1260 feet long. Wall is 16" wide x 6' - 0" high. top of wall is 16" below grade. Delta T is -35 (F) winter to 95 (F) summer. Wall is reinforced EW EF with 20M bars at 6" o.c. I'm told by 'someone...

Anybody aware of a way/equation/reference to calculate the temperature inside a piece of 'Mass Concrete'. Yes there are a lot of variables.

So..... Submerged Untreated Timber Piles doing a condition assessment of. Biodegredation, biodeterioration, bacterial wood degradation would seem to be a relatively new, 10 or so years, condition coming out of Holland and based on a large scale assessment of submerged untreated timber piles...

coming from another post about floor vibrations in wood floor systems this; So there are system factors that vary from a simple joist with a nailed plywood sub-floor to a field glued and nailed sub-floor with an attached drywall ceiling all of course sufficiently nailed. As we progress through...

Hi All, Is anybody aware of limits/criteria for acceptable vibration of wood floor systems? This particular residential floor is composed of 20' long proprietary wood floor trusses with an additional inch and a half of lightweight concrete topping. A review of codes and standards gives lots of...

So if you are connecting an addition to an existing building what is the conscensus on the use of the Response Modification Factor and the system Overstrength Factor? By that I mean if the existing, older building, has different factors than the new addition what Factors would you use for the...

Hi all, have a roof truss that I'm designing in a Gymnasium. Truss spans 80' and supports 40'owsj each side and also supports a large folding wall accordian door divider. Thoughts on defelection limits and operability of the door. The dominate gravity load is snow. Thanks.

Does anybody know if they atmospheric moisture content surrounding wood cna be so high that fungis and molds can not survive? Almost as though the wood is submerged and no oxygen is present? If this is the case what would be the atmospheric moisture content that would make this so? Thanks.

Early days. What would be a general sort of rule of thumb for the allowable load for a timber pile? 20 tons? Just ballparking some stuff. Yes there's lots more info needed. Thanks

Help me here if possible, cantilever retaining walls; Ok so I can visualize active pressure acting on a wall. displacemant, rotation, or deflection of the wall I can visualize at-rest pressure on a basement wall. I can visualize passive pressure on the low side of a retaining wall and it's...

Hi All, So when you are using a lightweight fill such as blocks of extruded polystyrene on the fill side of a retaining wall do you treat the lateral earth pressures on the wall as you normally would? Or do you negate or say there is no lateral earth pressure on the wall due to the use of the...

A number of the FEMA documents have a test method to determine the bed joint shear strength of the mortar of URM. Basically you remove two bricks from either side of a brick which remains in place undisturbed. On one side you have a 'push' cylinder that loads the brick, on the other side you...

Hi, Taking a look at the anchorage for wind loads of a tent structure about 60' x 120'. Does anybody know where to find references to determine capacity of the anchorage rods driven into ground? In this case the rods are 1" dia x 18" long and subjected to both lateral and vertical uplift loads...