Double T-beams

Common Am Supply. In this case, the preheated air is not individually supplied to each burner but is fed into a plenum chamber which is formed oy the furnace side wall and by additional mounted steel plates between two double-T beams. The burners are completely surrounded by the plenum chamber. 

In planning tank farms, legally required measures must be taken against the propagation of fires and explosions. Tank farms are built in a closed concrete basin that is sufficiently large to accommodate the contents of the largest tank. A minimum distance must be maintained between the individual tanks. Tanks for liquids are often mounted on double-T beams so that they can be inspected from below (Figure 2.6-2). 

Double ring structure with connecting beams, similar to Equisetum hyemale, constructed out of welded double T-beams. 

Zehnder, A.T. and Rosakis, A.J. (1990). Dynamic Fracture Initiation and Propagation in 4340 Steel under Impact Loading, International Journal of Fracture, 43, pp. 271-285. Kalthoff, J.F., Beinert, J. and Winkler, S. (1977). Measurements of Dynamic Stress Intensity Factors for Fast Running and Arresting Cracks in Double-Cantilever-Beam Specimens. n Fast Fracture and Crack Arrest, ASTMSTP 627, pp. 161-176, Hahn, G.T. and Kanninen, M.F. (Eds.). American Society for Testing and Materials. 

Hojo M, Aoki T. Thickness effect of double cantilever beam specimen on interlaminar fracture toughness of AS4/PEEK and T800/epoxy laminates. In Stinchcomb WW, Ashbaugh NE, editors. Composite materials fatigue and fracture, vol. 1156. ASTM Special Technical Publication 1993. pp. 281—98. http //dx.doi.org/10.1520/ STP24736S. 

Secondly, the same rubber-toughened epoxy adhesive as was used for the T-peel tests [45] discussed in Section 3.3 has also been studied [51,57] using a LEFM test specimen, i.e. the standard tapered-double cantilever-beam specimen [58]. At the same rate of test and for the same locus of joint failure, a value of Gc of 2750 100 J/m was determined using the LEFM test, compared with a value 2900 400 J/m from the T-peel tests. Thus, here we have completely different test geometries giving the same value of Gc. So, again, a cross-check indicates the robustness of the above analytical approach for modelling the peel test. 

BSI (1993) Peel test for a flexible bonded-to-rigid test specimen assembly. 180 degree peel. Adhesives, BSI BSI (2001) Determination of the mode 1 adhesive fracture energy, ( o of structural adhesives using the double cantilever beam (DCB) and tapered double cantilever beam (TDCB) specimens. BS 7991 BSI (2005) T-Ped test for flexible-to-flexible bonded assemblies. Adhesives, BSI... 

The frill width at half maximum of the autocorrelation signal, 21 fs, corresponds to a pulse width of 13.5 fs if a sech shape for the l(t) fiinction is assumed. The corresponding output spectrum shown in fignre B2.1.3(T)) exhibits a width at half maximum of approximately 700 cm The time-bandwidth product A i A v is close to 0.3. This result implies that the pulse was compressed nearly to the Heisenberg indetenninacy (or Fourier transfonn) limit [53] by the double-passed prism pair placed in the beam path prior to the autocorrelator. 

Two identical reaction solutions were prepared, one at T,(= 25.000 °C) in the sample compartment of a double-beam spectrophotometer, the other at T2( = 27.170 °C) in the reference beam. A direct recording of AAbs = Absi - Abs2 was made as a function of time while the difference in reaction temperature was maintained to 0.0001 °C. Evaluate kffk and AW1 for the run shown note this calculation is possible with an arbitrary time axis. 

Page, R. H., Shen, Y. R., and Lee, Y. T. (1988), Local Modes of Benzene and Benzene Dimer, Studied by Infrared-Ultraviolet Double Resonance in a Supersonic Beam, J. Chem. Phys. 88, 4621, 5362. 

The crystal structures of all amphibole minerals, including the asbestiform varieties, are most easily understood as variations on a basic structural unit called an I-beam. The term I-beam alludes to the cross-sectional shape of the three-part structure consisting of corner-linked (Si04) and/or (A104) tetrahedra (T) linked together into a double-tetrahedral chain that sandwiches a layer of edge-shared and R Og octahedra (O). R elements, which... 

The monochromatic X-ray was obtained by silicon (111) channel cut double crystal using white X-ray (at Beam Line 4A (PF)). The ion chambers were set at the both side of the photoacoustic cell, in order to compare the sp trum of photoacoustic X-ray absorption spectroscopy (PAXAS) with usual absorption spectrum, simultaneously. The chopper at chopping frequency of 10 Hz was t at the up-stream of these detectors. Copper foil (5 pm thick) was used as a sample. 

Spectra were obtained with a Perkin-Elmer Model 13 spectrophotometer (double beam) modified to scan and record linearly in frequency [9]. A calibrated LiF prism was used with estimated frequency accuracy rh 4 cm"1. The spectral slit- width was about 9 cm "1 at 3600 cm"1 and 6 cm"1 at 3000 cm 1v Transmission accuracy is estimated at 0 5% in the region 30-50% T, where most measurements were made. The zero and 100% transmission values were measured for each spectrum, and a correction was applied for false energy. 

Figure 10.12—Sequence of events necessary to obtain a pseudo-double beam spectrum with a Fourier transform IR spectrometer. The instrument records and stores in its memory two spectra representing the variation of lu (blank) and / (sample) as a function of wavenumber (emission spectra 1 and 2 above). Then, it calculates the conventional spectrum, which is identical to that obtained on a double beam instrument, by calculating the ratio T — /// — f(A) for each wavenumber. Atmospheric absorption (CO2 and H20) is thus eliminated. The figure illustrates the spectrum of a polystyrene film.

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