Nov 18, 2011 · Hello, Contractor wants to place a mud mat under a cantilever retaining wall footing. I'm ok with that in principle but was wondering if I should require a minimum thickness and if so, why. Frankly, I'm more concerned about the effect on the coefficient of …

Jul 26, 2007 · A mud mat (or blinding concrete) is never a structural element - would not count on it for any strength or load distribution. Had a client in a former French Colony in SE Asia who was upset that for a foundation excavation (which the contractor had excavated a bit too small in one corner) that we had placed the mud mat on what was open and then ...

Jun 14, 2001 · A mud mat or blinding concrete, being in the order of 50 mm thick or so, is NOT a structural element and should not be considered as such. it is there to prevent the approved soil foundation from being disturbed due to precipitation or workers walking on it and disturbing it (normally with some water issues) and to provide a level surface on ...

Jan 22, 2003 · In the past we have used mud mats (working slabs)to create conistency of rebar placement and improve construction quality to justify reducing cover to 2". We recently have debate using biodegradable void forms so that the concrete will not be cast directly against grade.

Jan 2, 2015 · I know this has been discussed on here more than one once but I still have some questions... One of the many changes in 318-14 included rewording and organization of minimum reinforcement requirements. Looking at 13.3.4.4 minimum flexural reinforcement for non-prestressed mat foundations shall...

May 7, 2002 · A paper was completed by G.F. Sowers and C.S. Hedges “Dynamic cone for Shallow In-Situ Penetration Testing” ASTM STP 399, Am. Soc. Testing Mats., 1966, p 29. This paper also has some correlations of the DCP blows to SPT blows for various soils including piedmont soils in the south.

Jan 26, 2004 · Hello Looking at a pumping system comprising 3 VSD centrif pumps discharging into a rising main. Pumps can run either on their own or any 2 in parallel. I want to ensure that in parallel the load is shared and pumps run at same speed. To maintain a dedicated pressure in the main, is it best to...

Aug 7, 2007 · (about 16" long) I made T handle that screws to the theaded end. As we stack the blades on the rod we space each blade with 2" washers made of plastic mud flaps (Local truckstop gives them to us free) This whole arrangment is stored in a lockable cabnet. Ed Bissell For information only you might want to be careful what you put down your drain.

Jan 11, 2006 · Congratulations pierreick on being selected by the Eng-Tips community for having the most helpful posts in the forums last week.

Oct 18, 2006 · Hello folks: I came across this clause in ASCE 5-05/ACI 530-05 sec 2.2.32 "Allowable tensile stresses for masonry elements subjected to out-of-plane or in-plane bending shall be in accordance of table 2.2.3.2 " Table 2.2.3.2 gives allowable flexural tensile stress values for clay and cmu. My...