I have ice and snow build up on my condo roof how much weight can the roof take?

I have tried to contact the management company of the condo the so called management person never gets back to me on how to handle the situation seeing that it is their responsibility. So I am wondering how much weight the roof can take? The roof is sloped but there has not been much melting. I can see the ice hanging over the gutters but it is too hard to chip away at. I saw on the news that there is suppose to be another snow storm which is going to give us another six inches of snow. I cannot do anything because it is the condos responsibility.Will my roof hold up under the weight. Just two years ago they re shingled the roof and this past year they redid the gutters.