Vertical Ribs Research Articles

Wind effects on rough-walled and smooth-walled large cooling towers

Adding vertical ribs is recognized as a useful practice for reducing wind effects on cooling towers. However, ribs are rarely used on cooling towers in China since Chinese Codes are insufficient to support the design of rough-walled cooling towers, and an “understanding” hampers the use of ribs, which thinks that increased surface roughness has limited effects on the maximum internal forces that control the structural design. To this end, wind tunnel model tests in both uniform flow field with negligible free-stream turbulence and atmospheric boundary layer (ABL) turbulent flow field are carried out in this article to meticulously study and quantify the surface roughness effects on both static and dynamic wind loads for the purpose of improving Chinese Codes first. Subsequently, a further step is taken to obtain wind effects on a full-scale large cooling tower at a high Re, which are employed to validate the results obtained in the wind tunnel. Finally, the veracity of the model test results is discussed by investigating the Reynolds number (Re) effects on them. It has been proved that the model test results for atmospheric boundary layer flow field are all obtained in the range of Re-independence and the conclusions drawn from model tests and full-scale measurements basically agree, so most model test results presented in this article can be directly applied to the full-scale condition without corrections.

DESIGNING OF CONSTRUCTIVE SHADING DEVICES

The paper shows how to determine dimensions of stationary horizontal (canopies) and vertical (ribs) shading devices in order to prevent penetration of normal beam solar radiation into the buildings during warm season of the year. While analyzing formulae for insolation rate equations for determination of dimensions of canopies and ribs which are perpendicular and inclined to the plane of intensively irradiated fenestrations orientated to the South, South-East, South-West, East and West have been obtained in the paper. Sloping canopies have the smallest dimensions. What is more, an angle of slope with regard to opening plane must correspond to elevation of sun station at an hour when there is a maximum specific heat flow rate of normal beam solar radiation. The paper considers an influence of canopies and ribs on transmission of diffuse solar radiation which along with normal beam solar radiation serves for creation of natural illumination. As follows from the analysis of formulae it is possible to make a conclusion about an inefficiency of vertical shading elements due to large rib dimensions and decrease in transmission of diffuse solar radiation. Minimum distances from fenestration reveal to the canopy have been determined for various orientations proceeding from the position that the opening must be maximally illuminated by normal beam solar radiation during the cold season of a year in order to reduce heat inputs for building heating. On the basis of dependence analysis we have come to a conclusion that it is appropriate to design stationary shading devices for fenestrations orientated only to the South and they must be sloping canopies. It is necessary to select glazing with a small index of solar factor for openings orientated to other corners of the Earth and reduction of solar radiation heat inputs.

Crushing analysis of thin-walled beams with various section geometries under lateral impact

Due to the advantages of light weight and excellent energy absorption capacity, thin-walled beams are widely used as strengthen parts or energy absorbers in vehicle body. Thus, the collapse behaviors and mechanical properties of thin-walled beams under the static and dynamic loadings have drawn great attentions of the researchers. In vehicle side crash accident, the contact parts of the vehicle usually deformed in bending mode. Thus, it is significantly important to investigate the bending collapse behaviors of these parts. In this study, the bending behaviors of several thin-walled beams with simple cross section subjected to lateral impact were investigated using analytical and numerical methods. The crashworthiness parameters such as energy absorption (EA), average crash force (Favg), peak crash force (Fmax) and crash force efficiency (CFE) were employed to evaluate the bending resistant property. In order to study how geometry shapes affect the bending performance, the main geometry parameters such as radius/radius ratio of circular/ elliptical section, side length ratio of rectangular section, height and base angle of hat section were chosen as the design parameters. After investigating the beams with simple cross sections, some new beams with complex cross sections were constructed by combing these simple beams or adding reinforce ribs to these simple beams. Then, the bending performance of these new beams was studied by numerical simulation and compared with original section beams. Result shows that the section type b performs better in SEA and CFE than original simple section beams. It also can be concluded that adding ribs can greatly improve the bending resistant performance for circular, rectangular and hat section beams, and the vertical ribs can achieve the best reinforce effect for the circular and rectangular section beams.

Genetically determined patozoospermia. Literature review and research results

Genetic factors (chromosomal aberrations and point mutations) are the cause of infertility in 10–15 % of men with impaired fertility. Homogeneous structural and functional defects in the sperm or the total terato-, asthenozoospermia – rare cases of genetically determined male infertility, are autosomal recessive diseases. Currently, described 4 types of «syndromic» spermopatology. 1. Primary ciliary dyskinesia (PCD) in men with total asthenozoospermia. Affects axoneme structures (microtubules, dynein arms, radial spokes). It identified more than 20 chromosomal loci responsible for the development of the PCD. 2. Dysplasia of the fibrous sheath of sperm tail in men with asthenozoospermia. The shortened and thickened sperm tail observed with disorganization of vertical columns and cross ribs of the fibrous sheath. Candidate genes – genes family ACAP. 3. Globozoospermia in men with teratozoospermia characterized by the presence of sperm with round heads, primary lack of acrosome and disorganization middle part of the flagellum. Found mutations or deletions of genes SPATA16, PICK1 and DPY19L2. 4. Syndrome decapitated spermatozoa in men with teratozoospermia (microcephaly). Abnormalities in the spermiogenesis development of connecting part jf the tail and proximal (morphologically normal) centrioles. In 2012–2014 years we have studied the ultrastructure of 2267 semen samples of men with impaired fertility. Globozoospermia revealed in 7 patients, dysplasia of the fibrous sheath – 13, decapitated sperm – in one. PCD was revealed in 4 patients (lack of axoneme dynein arms was found in 1 patient, absence of axoneme radial spokes – in 3 patients. The problem of genetically determined patozoospermya must be taken into account when the assisted reproductive technologies practises. There are few cases of successful assisted reproductive technologies with sperm of these patients. We don»t know the etiological factors of syndromic spermopatologe, so we cannot determine the degree of genetic risk.

Analyses of a leaking styrene-acrylonitrile water-filter housing

Fatigue cracks were found in water-filter housings made of styrene-acrylonitrile. These cracks initiated on the external surface, along the sharp corner between the wall of the housing and the vertical external ribs or at a pre-existing crack in the base of the water-filter housing. The reason for the crack was the high stress concentration due to an inappropriate design or the poor quality of the filter housing in combination with water-pressure impacts during the operation of an electromagnetic water valve and taps.

Wall-Roughness Effects on Flow and Scouring in Curved Channels with Gravel Beds

Due to a complex three-dimensional flow pattern, the outer banks of river bends are predisposed to erosion. When endangering civil structures, preventing measures to mitigate this erosion are thus required. Vertical ribs at protection walls for scour reduction have been applied to several flood protection projects in mountain rivers; nevertheless, no systematic and intensive study has been presented so far to evaluate their effect. This paper investigates experimentally the effect of vertical ribs, placed as macroroughness elements on the outer vertical wall of a 90° laboratory channel bend. Systematic tests were performed using a wide and coarse grain-size distribution. Scour formation and velocity distribution were assessed in the channel in the presence of a macrorough outer bank, materialized in the laboratory by vertical elements placed on the outer vertical wall along the channel bend. Experiments showed that the macrorough outer bank changed considerably the bed morphology under equilibrium conditions. Maximum scour depth is considerably reduced by the vertical ribs placed at an optimal spacing on the bend outer wall. A considerable grain sorting process occurs across the cross section in the bend, which influences the scour process; differences are observed between situations with and without macrorough banks. The distribution of the time-averaged velocity field across the section shows the influence of the channel rough wall. An optimal macroroughness configuration in terms of scour reduction is discussed and proposed. It was observed that when spacing between vertical ribs is too reduced, these ribs act as uniformly distributed wall roughness, contributing to the width reduction due to the occupation of the cross section and increasing consequently the flow velocity with negative effects in scour reduction.

Reliability analysis of a corrugated I-beam girder with ribs

The main aim of this paper is to provide a reliability analysis of a corrugated-web I girder, including the vertical ribs distributed periodically throughout its length. The generalised stochastic perturbation method and its computer implementation – the stochastic finite-element method – are both used to accomplish this goal. They are numerically implemented using the finite-element method system Abaqus with its rectangular, four-noded, structural, thin-shell finite elements and computer algebra system Maple, in which all the probabilistic procedures are programmed. The perturbation-based results are compared with those from traditional Monte Carlo simulation and, separately, an analytical solution is obtained by way of symbolic integration, carried out also in Maple. The plate girder thickness is introduced as the basic input Gaussian random variable in this study, as the most influential geometrical parameter in this structure. The reliability indices are determined according to both first- and second-order reliability methods, and correspond to the serviceability limit state of the structure. The first four basic probabilistic characteristics of the maximum deflection are also computed – expectations, coefficients of variation, skewness and kurtosis. The results obtained here and the entire methodology may be extended further towards computational modelling of the corrosion process, which is frequently mathematically modelled in steel structures using certain time series with random coefficients.

Bacterial colonization of VEPTR implants under repeated expansions in children with severe early onset spinal deformities.

Historically, severe spinal and thoracic deformities in children were treated with early long spinal fusions. This prevented further growth of the spine and thorax and often led to small stiff thoraces. Therefore, growth-retaining implants, like vertical expandable titanium ribs (VEPTR), were developed to stimulate thoracic and spinal growth. To accommodate growth, these implants have to be expanded every 6months. Infection rates of up to 2% per procedure are reported. Exchange of implant parts allows analyzing the development of implant-related infections and subclinical colonizations. In this prospective study, all patients undergoing repeat VEPTR expansion procedures at our institution were included. Preoperatively, clinical signs of infection were documented, and blood samples were taken. The removed implants were treated by sonication and microbiologically analyzed. The clinical follow-up was documented. From January 2009 to May 2012, 39 children with 163 re-operations were included. Four of the 39 patients (10%) developed clinical apparent infections and had implant removal. These were excluded and analyzed separately. Of 144 procedures, implant parts were eligible for analysis. Implant colonization was detected by sonication in 24 of 144 (16%) operations in 18 out of 39 (46%) patients. Repeated detection occurred in 5 (14%) patients. No risk factors for colonization could be identified. The rate of implant colonization is 4.5 times higher than the rate of manifest infections in VEPTR patients. Colonization may lead to a manifest infection over time. The knowledge of persistent implant colonization may change the treatment algorithm in patients with growth-retaining implants.

A new device for determining the compression after impact strength in thin laminates

In this work a new device has been developed to estimate compression-after-impact (CAI) strength. This device allows the testing of laminates thinner than those recommended by CAI test standards. The proposed device is composed of a support structure, with a set of vertical ribs that stabilize the specimen during the test, increasing the buckling load. A numerical analysis was made to ensure that global buckling does not occur in the laminate during the CAI test, and that there is no interference with the damage area. Laminate specimens were tested with the proposed device and the ASTM device. For specimens 4.416mm thick (thickness according to ASTM D7137 standard), the test results were similar with both devices. For thinner laminates, higher CAI strength was estimated with the proposed device than with the ASTM device, showing that the global buckling was delayed.

Computational Modelling of the Structural Integrity following Mass-Loss in Polymeric Charred Cellular Solids

A novel computational technique is presented for embedding mass-loss due to burning into the ANSYS finite element modelling code. The approaches employ a range of computational modelling methods in order to provide more complete theoretical treatment of thermoelasticity absent from the literature for over six decades. Techniques are employed to evaluate structural integrity (namely, elastic moduli, Poisson’s ratios, and compressive brittle strength) of honeycomb systems known to approximate three-dimensional cellular chars. That is, reducing the mass of diagonal ribs and both diagonal-plus-vertical ribs simultaneously show rapid decreases in the structural integrity of both conventional and reentrant (auxetic, i.e., possessing a negative Poisson’s ratio) honeycombs. On the other hand, reducing only the vertical ribs shows initially modest reductions in such properties, followed by catastrophic failure of the material system. Calculations of thermal stress distributions indicate that in all cases the total stress is reduced in reentrant (auxetic) cellular solids. This indicates that conventional cellular solids are expected to fail before their auxetic counterparts. Furthermore, both analytical and FE modelling predictions of the brittle crush strength of both auxteic and conventional cellular solids show a relationship with structural stiffness.

Congenital pseudoarthrosis of the clavicle with bifurcation.

Congenital pseudoarthrosis of clavicle is a rare clinical entity. It usually presents as a swelling in the clavicular region at birth or soon after birth. Fitzwilliam's original description of 60 subtypes of congenital pseudoarthrosis of clavicle have addressed several anatomical variants, e.g. association with cervical rib and abnormally vertical and elevated upper ribs. However, congenital pseudoarthrosis of clavicle associated with bifurcation is an atypical anatomic variant. To the best of our knowledge, this variant has never been mentioned in the literature. In the present report, we have described this subtype of symptomatic congenital pseudoarthrosis of the clavicle with bifurcation and its possible management.

Vascular Structure Design of an Artificial Tree for Microbial Cell Cultivation and Biofuel Production

This paper reports the design of a vascular structure for an artificial tree, also known as an evaporation-driven porous substrate bioreactor (PSBR), for efficient biofuel production using microalgae. This system consists of multiple vertical ribs, each of which is made of porous membrane and grows algal cells on its surface as a biofilm. Nutrient medium flow through the reactor is driven by evaporation at the terminal end of the porous membrane, and nutrients are delivered from the porous membrane to the cells by diffusion. Flow through the membrane was modeled as a function of the physico-chemical and morphological properties of the membrane, as well as the environmental parameters governing evaporation. It was determined that under typical operating conditions, the evaporative flux from the evaporator region ranged from about 14 to 66 mg/m\(^2\) s. Moreover, there was a membrane pore radius that maximized nutrient medium flow as a result of the competition between capillary, viscous, and gravitational forces. For the range of evaporative fluxes observed in this study, this pore radius was about 10 \(\upmu \)m. Furthermore, a design example is provided for artificial trees made of three different commercially available membrane materials. A design methodology was demonstrated for maximizing photosynthetic productivity by tuning the evaporation-driven flow rate to ensure sufficient nutrient delivery to cells without incurring large evaporative loss rates. It was observed that both the growth rate and the evaporation-driven nutrient delivery rate were directly related to the irradiance in outdoor artificial trees, which provides a passive and efficient nutrient delivery mechanism. It is expected that the design principles along with the physical models governing the fluid flow in these vascular structures will aid researchers in developing novel applications for artificial trees.

Extraspinal ossifications after implantation of vertical expandable prosthetic titanium ribs (VEPTRs).

IntroductionThough developed for thoracic insufficiency syndrome, the spinal growth-stimulating potential and the ease of placement of vertical expandable titanium ribs (VEPTRs) has resulted in their widespread use for early-onset spine deformity. Observation of implant-related ossifications warrants further assessment, since they may be detrimental to the function-preserving non-fusion strategy.Patients and methodsRadiographs (obtained pre and post index procedure, and at 4-year follow-up) and the records of 65 VEPTR patients from four paediatric spine centres were analysed. Ossifications were classified as type I (at anchor points), type II (along the central part) or type III (re-ossification after thoracostomy).ResultsThe average age at the index procedure was 6.5 years (min 1, max 13.7). The most prevalent spine problem was congenital scoliosis (37) with rib fusions (34), followed by neuromuscular and syndromic deformities (13 and 8, respectively). Idiopathic and secondary scoliosis (e.g. after thoracotomy) were less frequent (3 and 4, respectively). Forty-two of the 65 (65 %) patients showed ossifications, half of which were around the anchors. Forty-five percent (15/33) without pre-existing rib fusions developed a type II ossification along the implant. Re-ossifications of thoracostomies were less frequent (5/34, 15 %). The occurrence of ossifications was not associated with patient-specific factors.ConclusionsImplant-related ossifications around VEPTR are common. In contrast to harmless bone formation around anchors, ossifications around the telescopic part and the rod section are troublesome in view of their possible negative impact on chest cage compliance and spinal mobility. This potential side effect needs to be considered during implant selection, particularly in patients with originally normal thoracic and spinal anatomy.

Determining mainstream reference temperature using the non-dimensional temperature analysis in the transient liquid crystal technique

Transient thermochromic liquid crystal technique (TLC) has been widely used for measuring surface temperature distribution and local heat transfer coefficient (h). For flow inside ducts, the mass-flow-averaged temperature (Tm) and the adiabatic wall temperature (Taw) are often used as mainstream reference temperature. They are difficult to measure and a systematic error is often introduced into the results. In the present study, a novel method is developed to resolve the mainstream reference temperature from the measured temperatures at several locations using non-dimensional temperature analysis. TLC experiments of a square channel with vertical ribs, 45° ribs or V-shaped ribs are carried on, with relative CFD simulations. It is showed in the results that using the non-dimensional temperature analysis method, Nusselt number based on Tm can be adjusted by 4–15%, especially when there is large spanwise temperature variations. The systematic error of transient experiments is reduced. Taw and h can be solved in the experiments using mixed liquid crystals whether mainstream temperature history is an ideal step or not.

개수로 측벽 세로돌출줄눈의 흐름저항

급경사 산지하천 수충부의 호안은 대부분 콘크리트 옹벽으로 되어있다. 표면이 매끄러운 콘크리트 옹벽호안은 유속을 더 강화시키기 때문에 수충부 홍수피해의 원인이 되기도 한다. 본 연구에서는 개수로의 한 측벽에 설치한 정사각형 단면의 세로돌출줄눈이 흐름저항에 미치는 영향을 파악하기 위해 수리실험을 수행하였다. 돌출줄눈의 설치간격은 무차원 돌출줄눈 간격 <TEX>${\lambda}_{nv}$</TEX>를 기준으로 조도유형 d형과 k형을 포함하도록 설계하였다. 흐름의 Froude 수는0.81~1.12의 범위였다. 흐름저항은 돌출줄눈의 설치간격과 유량에 좌우되었다. <TEX>${\lambda}_{nv}$</TEX>가 9일 때 흐름저항이 가장 큰 것으로 나타났다. 세로돌출줄눈은 유량이 증가하면 d형 조도에서는 흐름저항을 감소시켰으나 k형 조도에서는 흐름저항을 증가시켰다. 흐름저항의 증가폭은 <TEX>${\lambda}_{nv}$</TEX>이 9~12의 범위에서 상대적으로 더 크게 나타났다. 세로돌출줄눈에 의한 흐름저항은 대부분 형상저항에 의한 것이며 그 등가조도높이는 수심규모로 발생할 수 있고 흐름저항에 미치는 영향이 매우 크다. 측벽의 세로돌출줄눈은 흐름저항을 증가시키고 최대유속의 발생위치를 수로의 횡단면 중앙방향으로 이동시키는 수단으로 사용될 수 있을 것이다. Most of flood protection walls built on the impingement in mountain rivers have been made of concrete. It may cause flood disasters because the smooth wall surface could increase flow velocity. In this study the hydraulic experiments was carried out to evaluate the effect of one side wall with rectangular vertical ribs on flow resistance in open channel. The ratio of the pitch between vertical ribs to its depth, <TEX>${\lambda}_{nv}$</TEX>, was designed so that it include the so-called d type and k type roughness. The range of Froude number, <TEX>$F_r$</TEX>, based on hydraulic radius is 0.81~1.12. Flow resistance in the open channel with a rib sidewall depends on the interval length of each ribs and the flow discharge. Maximum flow resistance occurred when <TEX>${\lambda}_{nv}$</TEX> is 9. In the d type roughness which <TEX>${\lambda}_</TEX><TEX>{nv}$</TEX> is less than 3, the flow resistance decreases with increase of flow discharge. In the k type roughness which <TEX>${\lambda}_{nv}$</TEX> is greater than 3, the flow resistance increases with increase of flow discharge. The increments of flow resistance are especially great when <TEX>${\lambda}_{nv}$</TEX> are 9 and 12. The resistance due to vertical rib is mostly by the shape resistance and the vertical rib on one sidewall of open channel affects on the flow resistance so that the equivalent roughness heights of vertical rib may occur in scale of flow depth. Therefore the vertical ribs may be used to reduce the flow velocity and to move the location of maximum flow velocity from the rib sidewall to the centerward in a cross section of channels.

Optimal design of camber link component for light weight automobile using CAE (Computer Aided Engineering)

Increasing the fuel economy has been an inevitable issue for the development of new cars, and one of the important measures to improve the fuel economy is to decrease the vehicle weight. In this study, savings in weight using lightweight materials such as aluminum alloy can lead to increase fuel economy and reduction in air pollution. In order to obtain this goal, the researches about lighter and stronger link components have been studied without sacrificing safety. Aluminum alloy material has a weak point compared to the steel material in strength for life cycle. In this study, in order to design a lighter and more reliable chassis component using aluminum material as compared with existing steel chassis components, a new camber link shape was suggested by adding vertical ribs to an existing I-beam type link and to investigate how each design parameter makes an effect on the reliability and component weight. The computer aided engineering (CAE) was performed with 9 design parameters and 2 levels. Through the analysis of variance, 3 parameters which were the most influential one on weight were selected. Through these results, the weight of the aluminum camber link was 59% that of the steel link. The stiffness of the optimized aluminum camber link under all loads was more than 100% that of the steel link.

Smart hexagonal truss systems exhibiting negative compressibility through constrained angle stretching

Negative compressibility is the ability to expand in at least one dimension rather than shrinking upon the application of an externally applied hydrostatic pressure. It is shown that, contrary to current perception, negative linear compressibility may be obtained from re-entrant hexagonal truss systems of specific geometric features which deform through non-equal changes in the lengths of the cell walls when deforming through a constrained angle stretching rather than other modes of deformation (such as flexure or hinging, modes of deformation that also lead to auxetic behaviour in honeycombs). Negative compressibility is predicted in the vertical direction for particular re-entrant geometries of this smart hexagonal truss system when the vertical ribs are much stiffer than the inclined ribs.

Stability of supported cylindrical shell with geometric imperfections under combined loading

A numerical method for investigating stability of the supported cylindrical shell with account for geometric imperfection in the form of its deformation during in-service loading has been developed. The problem of nonlinear stability of the imperfect supported cylindrical shell under combined loading has been solved. The influence of the imperfection amplitude on the critical combination of loads and stability region of the supported shell has been evaluated. Introduction. Supported cylindrical shells find widespread use in many engineering fields such as industrial engineering, food, chemical and other industries. One of the main features required of these structures is the ensuring of their minimum weight with sufficient strength and stability. It can be fulfilled provided that geometric nonlinearity, which is typical of the structures with openings, stiffening rings or ribs on their surface operating under conditions close to boundary ones, is taken into consideration during the investigation of their load-carrying capacity and stability. The problem of evaluation of the influence of geometric imperfection on the stability of shell structures remains topical (1-9). Use of analytical methods involves the form of geometric imperfection of the supported shell to be expressed as trigonometric functions, which considerably narrows the focus of investigations. With the availability of modern calculation systems it is possible to express geometric imperfections arbitrarily (10-13), which enhances the physical understanding of the behaviour of imperfect shells. Despite widespread use of supported shells in engineering practice, the influence of imperfections on stability, especially under combined loading, has not been fully investigated. The paper is devoted to the solution of the problem of stability of the imperfect supported shell under wind loading with account for alternating pressure from the weight of the tank filled with liquid, which is placed at the top. A numerical approach, which is based on the finite element method and nonlinear analysis of stability of the shell with geometric imperfections in the form of its deformation, has been proposed. The limiting values for stress-strain state of the supported shell as well as critical values of combined loading, under which its overall stability conditions are fulfilled, have been determined. The influence of geometric imperfection of the supported shell on the critical values of combined loading and its stability region has been evaluated. Development of the Finite Element Model for the Supported Shell Considering Geometric Imperfection. The shell is a cylinder with two openings, which are reinforced with stiffening ribs. The shell walls are reinforced with vertical stiffening ribs at the top and with lower and upper rings. The shell has the following geometry: diameter D 56 1 . m, height H 53 . m, and wall thickness t 10 mm. The rings take the shape of a plate with width of 200

Coţofeni-Kostolac culture on the territory of north-eastern Serbia

Coţofeni-Kostolac culture on the territory of north-eastern Serbia

Use of the titanium vertical ribs osteosynthesis system for reconstruction of large posterolateral chest wall defect in lung cancer

We report a case of reconstruction of a large full-thickness posterolateral defect of the chest wall after resection of a stage III non-small cell lung carcinoma (NSCLC) using the combination of a vertical expandable prosthetic titanium device and a polytetrafluoroethylene (PTFE) mesh. A 40-year-old female presented with a NSCLC classified as type IIIA and required both neoadjuvant radiotherapy and chemotherapy. An en bloc resection including the left upper lobe, posterolateral segments of five ribs (K3-K7) and vertebral bodies (T3-T6) was performed through a posterior J-shaped approach. A vertical rib osteosynthesis system was used to ensure thoracic wall stability and mechanical organ protection, prevent ventilatory impairment, avoid incarceration of the tip of the scapula, and maintain an acceptable cosmetic aspect. The device was locked onto the middle arch of the second and eighth ribs. We hung the PTFE mesh from the titanium bars with multiple non-absorbable sutures under maximal tension. Final pathological classification was T4N0M0 with an R0 final resection status. After an uneventful course, the patient was discharged on postoperative day 10. This first experience indicates that vertical rib osteosynthesis combined with a PTFE mesh can be used safely and easily in a one-stage procedure for major posterior chest wall defects.