When the concrete cross-section has an insufficient area to maintain shear stresses below permissible values, additional resistance to shear may be provided in two ways. Shear compression failure, where the beam has a small shear span/depth ratio of the magnitude of 1-2.5 for concentrated loading and less than 5 for distributed loading.Diagonal tension failure, where the strength of the beam in diagonal tension is lower than its strength in flexure.Flexural failure in which cracks are mainly vertical in the middle third of the beam span.Procedure for the Shear design of RC Beamįundamentally, three modes of failure or their combination occur:.ACI Code Provision for Shear Design of RC Beam.Location of Critical Section for Shear Design.There are plenty of places to look – try Amazon. We haven’t heard anything good or bad about other brands, so really can’t recommend any one brand or type of satellite dish over another. We have a Wineguard dish and have been very happy with their customer service and technical support. It served us well for over 10 years – we recently upgraded to an HD-capable dish and receivers. We had Camping World do the installation since at the time they were co-located with Lazy Days where we bought our RV. We bought our original system in 2002, and we paid about $2000 to have the complete automated system installed. The best price is a relative thing and may be based on the level of customer support you get. If you also require internet service then you might consider internet satellite solutions that combine internet and TV satellite service on one dish. The big players for TV dishes are Winegard, KVH/Trac Vision, King Dome and VuQube. If you don’t care, then you may be able to get a less expensive system. Since HD is becoming the norm, you will probably want to have a system that provides it. Some dishes support both, but be careful that you know for sure. If you want a High Definition system, then make sure that you purchase equipment that supports HD for your preferred satellite TV service provider (DISH vs. We can’t help with the idea of in-motion TV as it is not something that we have any interest in. Pre-recorded shows may be another option. If so, then you will need to look for equipment and providers that offer that capability. There haven’t been many occassions where wind has interrupted our signal for any length of time.Īnother consideration is whether you want to have live in-motion television. We don’t have a dome, we have a roof-mounted Wineguard dish. Note that in heavy winds, the domes may do better – but we really can’t say. The domes have smaller dishes, especially low profile domes that are not very tall. In general, bigger dishes will tend to give you better reception than dome types under adverse weather conditions (rain, snow, fog). On the down side, they do need to be stored for transport, and then set up and disassembled. Another advantage is that they cost less. You can park under trees or near other obstacles as long as you can set up the dish nearby where there is a clear view of the southern sky. Also, since they are automatic and need to be installed, they typically cost more than portable units.Īn advantage for a portable satellite dish is greater flexibility in where you park your RV. The cons are that you may be more limited in where you park so you have a clear line of sight to the southern sky. Roof mounted units usually are programmed to find the satellite automatically. The pros for a roof-mounted satellite dish are they don’t take up any valuable storage space. There are advantages and disadvantages to these various choices.
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